1. Emulated EEPROM Function for Data storage (ref. 908LJ12)
2017/4/21
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
JSR READ_EE
Address High 1
Address Low 1
DataFile1 pointer
RAM
Segment0
Segment1
Segment2
Segment3
Segment4
Segment5
Segment6
Size
Control
Block
Boundary
FLASH memory
LIFO 1 1

2. In Circuit Flash Programming Platform (ref. 908LJ12)
2017/4/21
CPUSPD
Data Size
Address High 1
Address Low 1
Data0
Data1
DataN
DataFile1 pointer
CPUSPD
Data Size
Address High 1
Address Low 1
Data0
Data1
DataN
DataFile2 pointer
PROGRAM
VERIFY
FLASH :
LDHX $<DataFile1PTR>
JSR PRGRNGE :
LDHX $<DataFile2PTR>
JSR LDRNGE
RAM
RAM 2 1

3. HC908 Flash In System Programming through SCI Port
2017/4/21
HC908 Flash In System Programming through SCI Port
The window s/w allow user - Load/Upload data from MCU
- Erase/Program/Verify Flash Memory
ISP?
Start
Execute
User Code
Disable COP.
Exec. ISP Routine
Application System
TXD
RXD
SCI
68HC908
MCU
MC145407
RS232 3 1

4. HC908 Flash In System Programming through SCI Port
2017/4/21
HC908 Flash In System Programming through SCI Port
Registers
Monitor ROM
Vectors
$0040
$023F
$FE00
FLASH Programming
Algorithm
$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
I get many designers asking me how they can use the Monitor to program the Flash memory in circuit in the field. They are perplexed by the idea that Port A0 is used for 9600 baud serial communications. The answer to this question is "you don't use the Monitor".
The Monitor was intended to be used during the development phase of a project and for initial Flash programming control during the final product's manufacturing cycle. In all likelihood, <click> an application will use the SCI for serial communications with the outside world. The SCI can support various baud rates and has the necessary hardware to be significantly more robust than any port "bit-banging" method.
<click> Since the application won't use Port A0 for serial communications, <click> then the Monitor can't be used for reprogramming the Flash in the field. So can this be accomplished?
The answer is: user code programmed into the Flash. <click> For lack of a better terminology, we'll refer to this as the "User Monitor". This can perform all the same tasks as the Monitor ROM with the exception of using the SCI for communications and whatever additional application specific functions make sense.
<click> The User Monitor can have a copy of the Flash programming algorithm which it will write into RAM. Although this isn't strictly necessary, it can potentially enhance the User Monitor's overall operation. A User Monitor could be written to mimic the Monitor ROM's behavior exactly, but that would then require that the ICS software be used as the device interface, which may not be practical in most cases, such as a remote web-based weather station sitting on the top of a mountain. In this case, a web browser is the device interface, and it will be used to perform Flash reprogramming in the field.
<click> The User Monitor then operates the same as the Monitor ROM, <click> by downloading Flash data via the SCI into the RAM <click> and then executing the Flash programming algorithms from RAM <click> to erase the Flash <click> and then write the new data into the Flash. In this manner, <click> the entire Flash can be updated. 4 1

5. In-Circuit Programming system configuration
2017/4/21
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 of the system.
Personal Computer
Interface Board
Target System
OSC_1
Software
- MCUscribe
- ICS08
M68SPGMR08
OSC_SEL*
Additional H/W:
- Header x 1 pcs
- Diode x 2 pcs
- Resistor
- HC4066* x 1 pcs
PA0
RS232
VPP
VCC_S
GND
It may be some different control signals between interface
board and target system depends on different application
Example: GP32 and MR24/32 ICP Reference Demo board use 4 wires (PA0, Vpp, Vcc_s and GND).
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. 5 1

6. GP32 In-Circuit Programming Reference Demo
2017/4/21
GP32 In-Circuit Programming Reference Demo
GP32 Target board simulates a typical
application, user running code will be
executed after provided the power to
the board (rurns the LED on and off
repeatedly)
Remove the Target Board power and then
upgrade the firmware through four wires
and SPGMR with PC 6 1