AN1997 USB to GPIO Bridging with Microchip USB3.1 …ww1.microchip.com/downloads/cn/AppNotes/cn576827.pdfUSB to GPIO Bridging with Microchip USB3.1 Gen1 Hubs Author: Andrew Rogers

AN1997USB to GPIO Bridging with Microchip USB3.1 Gen1

Hubs

INTRODUCTION

The USB to GPIO bridging feature of Microchip’s USB 2.0 hubs provides system designers expanded system control and potential BOM reduction. General Purpose Input/Outputs (GPIOs) may be used for any general 3.3V level digital control and input functions. This feature is available on the Microchip USB5734 and USB58xx/USB59xx USB3.1 Gen 1 Hubs.

Commands may be sent from the USB Host to the internal Hub Feature Controller device in the Microchip hub to per-form the following functions:

• Set the direction of the GPIO (input or output)

• Enable a pull-up resistor

• Enable a pull-down resistor

• Read the state

• Set the state

SECTIONS

Section 1.0, General Information

Section 2.0, Part Number Specific Information

Section 3.0, SDK Implementation

Section 4.0, Manual Implementation

Section 5.0, Examples

REFERENCES

Consult the following documents for details on the specific parts referred to in this document.

• Microchip USB5734 Data Sheet







• Microchip AN1903 Configuration Options for the USB5734 and USB5744

• Microchip AN2316 Configuration Options for the USB58xx and USB59xx

Author: Andrew RogersMicrochip Technology, Inc.

2015-2016 Microchip Technology Inc. DS00001997B-page 1

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1.0 GENERAL INFORMATION

Microchip hub USB Bridging features in Microchip hubs work via host commands sent to a Hub Feature Controller embedded within the hub located on an additional internal USB port. In order for the bridging features to work correctly, this internal Hub Feature Controller must be enabled by default. Table 1 provides details on default Hub Feature Con-troller setters by device.

TABLE 1: DEFAULT SETTINGS FOR THE HUB FEATURE CONTROLLER ENABLE

Part Number Part SummaryHub Feature Controller Default

Setting

USB5734 4-Port USB3.1 Gen 1 Hub Enabled by default

USB5806 6-Port USB3.1 Gen1 Hub Enabled by default

USB5816 6-Port USB3.1 Gen1 Hub with Type-C™ Support on 1 Downstream Port

Enabled by default

USB5826 6-Port USB3.1 Gen1 Hub with Type-C Support on 2 Downstream Ports

Enabled by default

USB5906 6-Port USB3.1 Gen1 Hub with Type-C Support on the Upstream Port

Enabled by default

USB5916 6-Port USB3.1 Gen1 Hub with Type-C Support on the Upstream Port and 1 Downstream Port

Enabled by default

USB5926 6-Port USB3.1 Gen1 Hub with Type-C Support on the Upstream Port and 2 Downstream Ports

Enabled by default

The Hub Feature Controller is a USB2.0 WinUSB class device connected to an extra internal USB2.0 port in the hub. For example, in a four port hub, the Hub Feature Controller is connected to port 5 of the USB2.0 portion of the hub. The Product ID (PID) for the Hub Feature Controller is 0x2740 on USB5734, and 0x2840 on USB58xx/USB59xx. All bridging commands are addressed to the Hub Feature Controller, not the Hub.

FIGURE 1-1: MICROCHIP HUB CONTROLLER EXAMPLE

USB Host

MicrochipUSB5734 GPIO

I2CUARTSPI

prt4prt1 prt2 prt3

prt5

UpstreamPort

Hub FeatureController

DownstreamPort

DownstreamPort

DownstreamPort

DownstreamPort

U S B D e v i c e s

VID = 0x0424PID = 0x2740

DS00001997B-page 2 2015-2016 Microchip Technology Inc.

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FIGURE 1-2: MICROCHIP HUB CONTROLLER EXAMPLE

USB Host

MicrochipUSB5806 GPIO

I2C

SPI

prt5prt2 prt3 prt4

prt7

UpstreamPort

Hub FeatureController

DownstreamPort

DownstreamPort

DownstreamPort

DownstreamPort

U S B D e v i c e s

VID = 0x0424PID = 0x2840

prt1

DownstreamPort

prt6

DownstreamPort

The following GPIO Functions are supported:

• Set the GPIO Direction (Input or Output)

• Enable GPIO Internal Pull-up Resistor

• Enable GPIO Internal Pull-down Resistor

• GPIO Read State (Input Mode)

• GPIO Set State (Output Mode)

1.1 Set the GPIO Direction (Input or Output)

Each GPIO can be configured as either a Schmitt-triggered input or output with an 8 mA sink/source.

1.2 Enable GPIO Internal Pull-up Resistor

Each GPIO can be enabled with a 50 μA (typical) internal pull-up resistor. Internal pull-up resistors prevent unconnected inputs from floating. The pull-up is only 67k, so it may not be strong enough to drive a load of less than 100k. When connected to a load that must be pulled high, an external resistor must be added.

1.3 Enable GPIO Internal Pull-down Resistor

Each GPIO can be enabled with a 50 μA (typical) internal pull-down resistor. Internal pull-down resistors prevent uncon-nected inputs from floating. The pull-down is only 67k, so it may not be strong enough to drive a load of less than 100k. When connected to a load that must be pulled low, an external resistor must be added.

1.4 GPIO Read State (Input Mode)

Read a 0: GPIO is below 0.9V

Read a 1: GPIO is above 1.9V

Note: When configured as an input, the GPIOs are digital Schmitt-triggered inputs. The range 0.8V - 2.0V is an indeterminate input state, so 3.3V-2.5V signaling is supported.


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1.5 GPIO Set State (Output Mode)

Set to 0: GPIO Drives to 0.0V. When driven low, an 8 mA sink is enabled driving the pin to 0.4V or lower.

Set to 1: GPIO Drives to 3.3V. When driven high, an 8 mA source is enabled driving the pin to VDD33 - 0.4V or higher.


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2.0 PART NUMBER SPECIFIC INFORMATION

2.1 Part Summary

Table 2 summarizes the total number of available GPIOs by part number. Many of the GPIOs on the hub are only avail-able after configuration. The following methods may be used to configure the hub:

• ProTouch: If configuring via internal One-Time Programmable (OTP) memory, or if configuring via SPI EEPROM with a base firmware file.

• SMBus/I2C Configuration: If using an embedded SoC/I2C EEPROM to configure the hub at each start-up/reset.

• Pin Strapping: Many of the GPIOs are made available by specific pin strapping or by simply not populating a SPI EEPROM device.

TABLE 2: GPIO AVAILABILITY SUMMARY

USB5734 USB5806 USB5816 USB5826 USB5906 USB5916 USB5926

GPIOS Available By Default 7 0 4 3 4 3 2

Total Available GPIOs 16 14 10 9 10 9 8


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2.2 USB5734 GPIO Pins

TABLE 3: USB5734 GPIO AVAILABILITY AND CONFIGURATION REQUIREMENTS

Pin # Name Primary Function Configuration Required

7 GPIO7 PROG_FUNC7/GPIO Set CFG_STRAP to Mode 4

34 GPIO20 Port 4 Port Power Control

Disable Port 4 and Disable Port Power 4 Output + OCS 4 InputorSet hub into Port Power Ganged Mode and Disable Port Power 4 Output + OCS 4 Input







39 GPIO2 PROG_FUNC2/GPIO Set CFG_STRAP to Mode 1 or 4

40 GPIO3 PROG_FUNC3/GPIO Set CFG_STRAP to Mode 1 or 4

41 GPIO16 VBUS_DET Disable VBUS_DET function

42 GPIO4 SPI_CLK Do not use SPI ROM, UART, or I2C interface

43 GPIO5 SPI_DO Do not use SPI ROM, UART, or I2C interface

44 GPIO9 SPI_DI Do not use SPI ROM

45 GPIO7 SPI_CE_N Do not use SPI ROM

46 GPIO6 PROG_FUNC4/GPIO Set CFG_STRAP to Mode 4

47 GPIO8 PROG_FUNC5/GPIO Set CFG_STRAP to Mode 4 or Mode 5






50 GPIO65 SPEED_IND5 No config required.

53 GPIO23 HOST_TYPE0 No config required.






65 GPIO4 C_ATTACH3 Do not implement Type-C control on Port 3 in hardware.


69 GPIO69 PRT_CTL0 No config required.


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60 GPIO3 GPIO3 GPIO3 by default.







77 GPIO68 SUSP_IND No config required.




















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3.0 SDK IMPLEMENTATION

The simplest method for implementing the USB to GPIO bridging functions is to use the publicly available DLL which is distributed with the ProTouch2 configuration tool. The DLL is compatible with Windows operating systems. Visit the USB5734 product page on microchip.com to download ProTouch2 with the DLL package. Using the libraries available in the DLL, the bridging features can be implemented in C-code.

The DLL package contains the following:

• User’s Manual (Protouch2 DLL User’s Guide) with detailed description of how to use the DLL and call each func-tion

• Release Notes

• Library Files:

- For Windows: A “.dll” and a “.lib” file

- For Linux: a “.cpp” file that can be built into a “.a” file

• Example code

3.1 Commands Included in the SDK

• MchpUsbGpioConfigureGPIO: Configures a pin to behave as a GPIO.

• MchpUsbGpioGet: Sets the queried GPIO to an input (if not already set as such) and then reads the input state.

• MchpUsbGpioSet: Sets the queried GPIO to an output (if not already set as such) and then sets the output state.

For additional details on how to use the SDK to implement USB to GPIO bridging, download the SDK package and refer to the User’s Manual.


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4.0 MANUAL IMPLEMENTATION

The USB to GPIO bridging features may be implemented at the lowest level if you have the ability to build USB packets. This approach is required if you are not using a Windows or Linux host system and cannot use the SDK.

All USB to GPIO bridging commands are accomplished with internal register writes and reads. Further details can be found in Microchip application note AN1903 Configuration Options for the USB5734 and USB5744 or AN2316 Config-uration Options for the USB58xx and USB59xx. All USB to GPIO bridging commands must be sent directly to Endpoint 0 of the Hub Feature Controller connected to the last downstream port of the Microchip hub (i.e.: located on port 5 of a 4-port hub).

For details on the register read and write USB SETUP packets, refer to Section 4.1, "Register Read" and Section 4.2, "Register Write", respectively. The configuration register addresses and contents are detailed in Section 4.3, "GPIO Configuration Register Map for USB5734" and Section 4.4, "Register Definitions for USB5734".

4.1 Register Read

To read the state of a GPIO, a register read with the following USB SETUP packet must be used:

TABLE 10: REGISTER READ USB SETUP COMMAND

Setup Parameter Value Description

bmRequestType 0xC1 Device-to-host, vendor class, targeted to interface

bRequest 0x04 Register read command: CMD_REG_READ

wValue Register Address Valid Address Range: <0x0000> to <0xFFFF> [64KB]

wIndex 0x0000 Reserved

wLength Data Length Length of the data bytes to be retrieved

4.1.1 REGISTER READ USB TRANSACTION SEQUENCE

Command Phase: Hub Feature Controller receives the setup packet with the parameters specified in Table 10.

Data Phase: Hub Feature Controller sends the data bytes of length wLength from the specified address.

Status Phase: Hub Feature Controller sends ACK on successful completion of register read.

4.2 Register Write

To configure the direction of a GPIO, pull-up/pull-down resistor settings, or set the output state of a GPIO, a register write command with the following USB SETUP packet must be used:

TABLE 11: REGISTER WRITE USB SETUP COMMAND

Setup Parameter Value Description

bmRequestType 0x41 Host-to-device, vendor class, targeted to interface

bRequest 0x03 Register read command: CMD_REG_WRITE

wValue Register Address Valid Address Range: <0x0000> to <0xFFFF> [64KB]

wIndex 0x0000 Reserved

wLength Data Length Length of data bytes to write

4.2.1 REGISTER WRITE USB TRANSACTION SEQUENCE

Command Phase: Hub Feature Controller receives the setup packet with the parameters specified in Table 10.

Data Phase: Hub Feature Controller receives the data bytes of length wLength to be written to the register starting from the specified address.

Status Phase: Hub Feature Controller sends ACK on successful completion of register write.


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4.3 GPIO Configuration Register Map for USB5734

TABLE 12: USB5734 GPIO CONFIGURATION REGISTER MEMORY MAP

Addr. R/W Name Function Default

082Ch R/W GPIO_1_7_PD USB5734 GPIO 1-7 Pull-down Register 00h

082Dh R/W GPIO_8_11_PD USB5734 GPIO 8-11 Pull-down Register 00h

082Eh R/W GPIO_16_20_PD USB5734 GPIO 16-20 Pull-down Register 00h

0830h R/W GPIO_1_7_DIR USB5734 GPIO 1-7 Direction Control Register 00h



0834h R/W GPIO_1_7_OUT USB5734 GPIO 1-7 Output Register 00h



0838h R/W GPIO_1_7_IN USB5734 GPIO 1-7 Input Register 00h

0839h R/W GPIO_8_11_IN USB5734 GPIO 8-11 Input Register 00h

083Ah R/W GPIO_16_20_IN USB5734 GPIO 17-20 Input Register 00h

083Ch R/W GPIO_1_7_PU USB5734 GPIO 1-7 Pull-up Register 00h

083Dh R/W GPIO_8_11_PU USB5734 GPIO 8-11 Pull-up Register 00h

083Eh R/W GPIO_16_20_PU USB5734 GPIO 16-20 Pull-up Register 00h

0880h R/W GPIO_1_7_IN_EN USB5734 GPIO 1-7 Input Enable Register 00h



4.4 Register Definitions for USB5734

TABLE 13: USB5734 GPIO 1-7 PULL-DOWN REGISTER

GPIO_1_7_PD(082Ch)

GPIO 1-7 Pull-down Register

BIT Name R/W Description

7 GPIO_7_PD R/W Set bit to enable GPIO7 Pull-down resistor.







0 Reserved R Reserved


GPIO_8_11_PD(082Dh)



7:4 Reserved R Reserved






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GPIO_16_20_PD(082Eh)









TABLE 16: USB5734 GPIO 1-7 DIRECTION CONTROL REGISTER

GPIO_1_7_DIR(0830h)

GPIO 1-7 Direction Control Register


7 GPIO_7_DIR R/W Set bit to configure GPIO7 as an output.Clear bit to configure GPIO7 as an input.









GPIO_8_11_DIR(0831h)









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GPIO_16_20_DIR(0833h)









TABLE 19: USB5734 GPIO 1-7 OUTPUT REGISTER

GPIO_1_7_OUT(0834h)

GPIO 1-7 Output Register


7 GPIO_7_OUT R/W Access to the GPIO7 Output Register. Sets state of output pin.









GPIO_8_11_OUT(0835h)









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GPIO_16_20_OUT(0836h)









TABLE 22: USB5734 GPIO 1-7 INPUT REGISTER

GPIO_1_7_IN(0838h)

GPIO 1-7 Input Register


7 GPIO_7_IN R/W Access to the GPIO7 Input Register. Reads state of input pin.









GPIO_8_11_INP_BUF(0839h)









GPIO_17_20_INP_BUF(083Ah)










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TABLE 25: USB5734 GPIO 1-7 PULL-UP REGISTER

GPIO_1_7_PU(083Ch)

GPIO 1-7 Pull-up Register


7 GPIO_7_PU R/W Set bit to enable GPIO7 Pull-up resistor.









GPIO_8_11_PU(083Dh)









GPIO_16_20_PU(083Eh)










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TABLE 28: USB5734 GPIO 1-7 INPUT ENABLE REGISTER

GPIO_1_7_IN_EN(0880h)

GPIO 1-7 Input Enable Register


7 GPIO7_IN_EN R/W Set bit to configure GPIO7 as an input.






1 GPIO1_INP_EN R/W Set bit to configure PIO1 as an input.



GPIO_8_11_IN_EN(0881h)




3 GPIO_11_IN_EN R/W Set bit to configure GPIO11 as an input.





PIO_16_20_IN_EN(0882h)










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4.5 GPIO Configuration Register Map for USB58x/USB59xx

TABLE 31: USB58XX/USB59XX GPIO CONFIGURATION REGISTER MEMORY MAP

Addr. R/W Name Function Default

082Dh R/W GPIO_16_23_PD USB58xx/USB59xx GPIO 16-23 Pull-down Register 00h

082Eh R/W GPIO_8_12_PD USB58xx/USB59xx GPIO 8-12 Pull-down Register 00h

082Fh R/W GPIO_1_7_PD USB58xx/USB59xx GPIO 1-7 Pull-down Register 00h

0831h R/W GPIO_16_23_DIR USB58xx/USB59xx GPIO 16-23 Direction Control Register

00h


00h

0833h R/W GPIO_1_7_DIR USB58xx/USB59xx GPIO 1-7 Direction Control Reg-ister

00h

0835h R/W GPIO_16_23_OUT USB58xx/USB59xx GPIO 16-23 Output State Con-trol Register

00h

0836h R/W GPIO_8_12_OUT USB58xx/USB59xx GPIO 8-12 Output State Control Register

00h

0837h R/W GPIO_1_7_OUT USB58xx/USB59xx GPIO 1-7 Output State Control Register

00h

0839h R/W GPIO_16_23_IN USB58xx/USB59xx GPIO 16-23 Input State Read Register

00h

083Ah R/W GPIO_8_12_IN USB58xx/USB59xx GPIO 8-12 Input State Read Register

00h

083Bh R/W GPIO_1_7_IN USB58xx/USB59xx GPIO 1-7 Input State Read Reg-ister

00h

083Dh R/W GPIO_16_23_PU USB58xx/USB59xx GPIO 16-23 Pull-up Register 00h

083Eh R/W GPIO_8_12_PU USB58xx/USB59xx GPIO 8-12 Pull-up Register 00h

083Fh R/W GPIO_1_7_PU USB58xx/USB59xx GPIO 1-7 Pull-up Register 00h

096Eh R/W GPIO_72_PD USB58xx/USB59xx GPIO 72 Pull-down Register 00h

096Fh R/W GPIO_64_71_PD USB58xx/USB59xx GPIO 64-71 Pull-down Register 00h

0972h R/W GPIO_72_DIR USB58xx/USB59xx GPIO 72 Direction Control Reg-ister

00h


00h

0976h R/W GPIO_72_OUT USB58xx/USB59xx GPIO 72 Output State Control Register

00h

0977h R/W GPIO_64_71_OUT USB58xx/USB59xx GPIO 64-71 Output State Con-trol Register

00h

097Ah R/W GPIO_72_IN USB58xx/USB59xx GPIO 72 Input State Read Reg-ister

00h

097Bh R/W GPIO_64_71_IN USB58xx/USB59xx GPIO 64-71 Input State Read Register

00h

097Eh R/W GPIO_72_PU USB58xx/USB59xx GPIO 72 Pull-up Register 00h

097Fh R/W GPIO_64_71_PU USB58xx/USB59xx GPIO 64-71 Pull-up Register 00h


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4.6 Register Definitions for USB58x/USB59xx

TABLE 32: USB58XX/USB59XX GPIO 16-23 PULL-DOWN REGISTER

GPIO_16_23_PD(082Dh)












GPIO_8_12_PD(082Eh)




4 GPIO_12_PD R/W






GPIO_1_7_PD(082Fh)












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TABLE 35: USB58XX/USB59XX GPIO 16-23 DIRECTION CONTROL REGISTER

GPIO_16_23_DIR(0831h)



7 GPIO_23_DIR R/W Set bit to configure GPIO16 as an output. Clear to set as Input.









GPIO_8_12_DIR(0832h)










GPIO_1_7_DIR(0833h)












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TABLE 38: USB58XX/USB59XX GPIO 16-23 OUTPUT STATE CONTROL REGISTER

GPIO_16_23_OUT(0835h)

GPIO 16-23 Output State Control Register


7 GPIO_23_OUT R/W Sets the state of GPIO23 when configured as an output









GPIO_8_12_OUT(0836h)










GPIO_1_7_OUT(0837h)












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TABLE 41: USB58XX/USB59XX GPIO 16-23 INPUT STATE READ REGISTER

GPIO_16_23_IN(0839h)

GPIO 16-23 Input State Read Register


7 GPIO_23_IN R Reads back the state of GPIO23 when configured as an input.









GPIO_8_12_IN(083Ah)










GPIO_1_7_IN(083Bh)



7 GPIO_7_IN R/W Reads back the state of GPIO7 when configured as an input.









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TABLE 44: USB58XX/USB59XX GPIO 8-12 PULL-UP REGISTER

GPIO_16_23_PU(083Dh)












GPIO_8_12_PU(083Eh)










GPIO_1_7_PU(083Fh)












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TABLE 47: USB58XX/USB59XX GPIO 72 PULL-DOWN REGISTER

GPIO_72_PD(096Eh)

GPIO 72 Pull-down Register





GPIO_64_71_PD(096Fh)











TABLE 49: USB58XX/USB59XX GPIO 72 DIRECTION CONTROL REGISTER

GPIO_72_DIR(0972h)

GPIO 72 Direction Control Register





GPIO_64_71_DIR(0973h)












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TABLE 51: USB58XX/USB59XX GPIO 72 OUTPUT STATE CONTROL REGISTER

GPIO_72_OUT(0976h)

GPIO 72 Output State Control Register





GPIO_64_71_OUT(0977h)











TABLE 53: USB58XX/USB59XX GPIO 72 INPUT STATE READ REGISTER

GPIO_72_IN(097Ah)

GPIO 72 Input State Read Register





GPIO_64_71_IN(097Bh)












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TABLE 55: USB58XX/USB59XX GPIO 72 PULL-UP REGISTER

GPIO_72_PU(097Fh)

GPIO 72 Pull-up Register





GPIO_64_71_PU(097Fh)












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5.0 EXAMPLES

5.1 Read the Direction State of all GPIOs on USB5734

1. Command Phase (SETUP Transaction): Send the following SETUP Register Read Command to Endpoint 0 of the USB5734 Hub Feature Controller to read the contents of registers 0x830, 0x831, 0x832, and 0x833 which contain the direction control settings for all GPIOs.

TABLE 57: REGISTER READ SETUP COMMAND EXAMPLE

Setup Parameter Value Note

bmRequestType 0xC1 —

bRequest 0x04 —

wValue 0x0830 First register in a series of consecutive registers to read from.

wIndex 0x0000 —

wLength 0x0004 4 consecutive registers are to be read.

FIGURE 5-1: REGISTER READ SETUP TRANSACTION EXAMPLE

2. Data Phase (IN Transaction): Hub Feature Controller sends the data bytes of length wLength starting from the specified address after receiving an IN packet.

FIGURE 1: REGISTER READ IN TRANSACTION EXAMPLE

3. Status Phase (OUT Transaction): Host sends an OUT packet to complete the USB Transfer. Hub Feature Con-troller responds with a zero length data packet.

FIGURE 2: REGISTER READ OUT TRANSACTION EXAMPLE


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5.2 Write Registers to Set GPIO10 as an output on the USB5734

1. Command Phase (SETUP Transaction): Send the following SETUP Register Write Command to Endpoint 0 of the USB5734 Hub Feature Controller to write the contents of registers 0x830, 0x831, 0x832, and 0x833 which contain the direction control settings for all GPIOs. In this example, GPIO10 will be set as an output, all other GPIOS will remain at the default input state.

TABLE 58: REGISTER WRITE SETUP COMMAND EXAMPLE

Setup Parameter Value Note

bmRequestType 0x41 —

bRequest 0x03 —

wValue 0x0830 First register in a series of consecutive registers to write from.

wIndex 0x0000 —

wLength 0x0004 4 consecutive registers are to be read.

FIGURE 3: REGISTER WRITE SETUP TRANSACTION EXAMPLE

2. Data Phase (OUT Transaction): Host sends the four data bytes to set 0x830 = 0x00, 0x831 = 0x04, 0x832 = 0x00, and 0x833 = 0x00 from the specified address after sending the OUT packet.

FIGURE 4: REGISTER WRITE OUT TRANSACTION EXAMPLE

3. Status Phase (OUT Transaction): Host sends an IN packet to complete the USB Transfer. Hub Feature Con-troller responds with a zero length data packet.

FIGURE 5: REGISTER WRITE IN TRANSACTION EXAMPLE


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APPENDIX A: APPLICATION NOTE REVISION HISTORY

TABLE A-1: REVISION HISTORY

Revision Level & Date Section/Figure/Entry Correction

DS00001997B (12-07-16) All Fixed references to AN2316 Configuration Options for the USB58xx and USB59xx throughout.

Trademark and Sales Listing pages updated.

Updated minor formatting and grammar issues throughout.

DS00001997A (09-10-15) All Initial release.


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NOTES:


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• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable.”

Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.

Microchip received ISO/TS-16949:2009 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company’s quality system processes and procedures are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified.

QUALITYMANAGEMENTSYSTEMCERTIFIEDBYDNV

== ISO/TS16949==


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11/07/16

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Documents

AN1997 USB to GPIO Bridging with Microchip USB3.1 …ww1.microchip.com/downloads/cn/AppNotes/cn576827.pdfUSB to GPIO Bridging with Microchip USB3.1 Gen1 Hubs Author: Andrew Rogers