Prepared by K.M. Fung 8 Jan 2002Internal Use Only 1

Emulated EEPROM Function for Data storage (ref. 908LJ12)Emulated EEPROM Function for Data storage (ref. 908LJ12)

• The code is pre-installed in ROM and ready to use - USER FRIENDLY!• Data file can be located in any location of RAM - FLEXIBLE!• User defined data size to be programmed, 2bytes to 15 bytes at a time - FLEXIBLE!• FLASH endurance can be improved up to 60 times with 128 bytes block size.

CPUSPD

Data Size

Address High 2

Address Low 2

Data0

Data1

DataN

DataFile2 pointer :LDHX $<DataFile1PTR>JSR WRITE_EE :

:LDHX $<DataFile1PTR>JSR READ_EE :

CPUSPD

Data Size

Address High 1

Address Low 1

Data0

Data1

DataN

DataFile1 pointer

RAM

Segment0

Segment1 Segment2 Segment3 Segment4

Segment5 Segment6

SizeControl Control

BlockBoundary

FLASH memory

LIFO

Prepared by K.M. Fung 8 Jan 2002Internal Use Only 2

In Circuit Flash Programming Platform (ref. 908LJ12)In Circuit Flash Programming Platform (ref. 908LJ12)

Function Name Calling Address Feature

WRITE_EE $FC00 Stack the DATA segment from data file to the FLASH block and updates dirty control bitaccordingly. If block overflows, performs block erase.

READ_EE $FC03 Read last updated DATA segment from FLASH block back to data file.

LDRNGE $FF30 Load data from FLASH block to data file with specific location and size.

PRGRNGE $FC06 Program specific FLASH location with data listed in data file.

ERARNGE $FCBE Perform mass erase or single block erase according to user selection.

ICP_LDRNGE $FF24 Perform same operation as LDRNGE. This subroutine is specially designed to use undermonitor mode.

ICP_PRGRNGE $FF28 Perform same operation as PRGRNGE. This subroutine is specially designed to useunder monitor mode.

ICP_ERARNGE $FF2C Perform same operation as ERARNGE. This subroutine is specially designed to useunder monitor mode.

CPUSPDData Size

Address High 1Address Low 1

Data0Data1

DataN

DataFile1 pointer

CPUSPDData Size

Address High 1Address Low 1

Data0Data1

DataN

DataFile2 pointer

:LDHX $<DataFile1PTR>JSR PRGRNGE :

:LDHX $<DataFile2PTR>JSR LDRNGE :

PROGRAM VERIFY

FLASH

RAM RAM

Prepared by K.M. Fung 8 Jan 2002Internal Use Only 3

ISP?

Start

Execute User Code

Disable COP.Exec. ISP Routine

Application System

TXD

RXDSCI

68HC908MCUMC145407RS232

HC908 Flash In System Programming through SCI PortHC908 Flash In System Programming through SCI Port

The window s/w allow user - Load/Upload data from MCU - Erase/Program/Verify Flash Memory

Prepared by K.M. Fung 8 Jan 2002Internal Use Only 4

RegistersMonitor ROM

Vectors

$0040

$023F

$FE00

FLASH ProgrammingAlgorithm

$0000

$FFFF

ISP Routine

RxD

TxD

PTA0

I/O Registers

RAM

SCI

FLASH Data

FLASH

$8000

Erase FLASH

Application Software

Programming and erasing of FLASH locations cannot be performed by code being executed from the FLASH memory

HC908 Flash In System Programming through SCI PortHC908 Flash In System Programming through SCI Port

Prepared by K.M. Fung 8 Jan 2002Internal Use Only 5

In-Circuit Programming system configurationIn-Circuit Programming system configuration

• In-System Programming is a process by which the device is programmed or In-System Programming is a process by which the device is programmed or erased with the device on the final end target system without open the case erased with the device on the final end target system without open the case of the system.of the system.

Remark: OSC_SEL and HC4066 is used when the oscillation frequency of target system is not equal to the oscillation

frequency which required to entry to the monitor mode of the MCU.

Personal Computer Interface Board Target System

Software

- MCUscribe- ICS08 RS232

GND

VCC_S

VPP

PA0

OSC_SEL*

OSC_1

M68SPGMR08 Additional H/W:

- Header x 1 pcs- Diode x 2 pcs- Resistor- HC4066* x 1 pcs

It may be some different control signals between interface board and target system depends on different applicationExample: GP32 and MR24/32 ICP Reference Demo board use 4 wires (PA0, Vpp, Vcc_s and GND).

Prepared by K.M. Fung 8 Jan 2002Internal Use Only 6

GP32 In-Circuit Programming Reference DemoGP32 In-Circuit Programming Reference Demo

GP32 Target board simulates a typical application, user running code will beexecuted after provided the power to the board (rurns the LED on and offrepeatedly) Remove the Target Board power and then

upgrade the firmware through four wiresand SPGMR with PC