Renesas 38K0, Instruction Manual

Page: 17 / 35

RENESAS USB F
38K0/38K2 Group M 3A-8K02
ull-Speed Microcomputers
13
1.10 Flash Chip Reprogramming (G03)
M3A-8K02 enables the user to reprogram the Flash chip (G03) on board. As M38K29F8HPL, bundled with
this board, has been pre-programmed with the Flash rewriting control program, operational verification with the
Flash chip can be done immediately after debug. This rewriting control program can be reprogrammed with
either serial or USB interfacing: Flashwriter MFW-1 (Sunny Labs) or Flash-Over-USB (FOUSB).
As shown in Figure 1.10, the Flash rewriting control program can be selected using the BOOT-MODE switch
(S10 in 2) Table 1.10 shows the setup conditions for the BOOT-MODE switch. By setting the FLASH switch (S9
in 1) to ON and supplying power to the board (Note 2), the FLASH lamp (LED5 in 3) will go on and 38K0/38K2
will be in the Flash reprogramming mode. However, if the board Vcc is different than the firmware voltage
when processing the Flash rewriting control program, the chip may be damaged. Make sure the
VCC-SELECT switch (S7) is set to the same voltage as the firmware. Finally, make sure the oscillator is
compatible with the system as well.
Note 1: Do not set the BOOT-MODE switches while power is being supplied to the board.
Table 1.10 Selecting Flash Rewriting Control Program with BOOT-MODE Switches
P26 P27 P42 P16 Vcc Mode
* * H H 5V Serial Mode (use Flash writer)
* H L H 3.3V FOUSB 3V/6MHz
H L L H 5V FOUSB 5V/12MHz
L L L H 5V FOUSB 5V/6MHz
*: Either setting
1. FLASH
Switch
2. BOOT-MODE
Switches
3. FLASH
Lamp
Figure 1.10 Selecting the Flash Program