CHAPTER 16 FLASH MEMORY (
µµµµ
PD70F3116)
737
User’s Manual U14492EJ3V0UD
16.6.2 Flash memory programming mode
When rewriting the contents of flash memory using the dedicated flash programmer, set the V850E/IA1 in the flash
memory programming mode. To switch to this mode, set the MODE0, MODE1, MODE2, and V
PP
pins before
canceling reset.
When performing on-board writing, change modes using a jumper, etc.
•
MODE0: High-level or low-level input
•
MODE1: High-level input
•
MODE2: Low-level input
•
V
PP
:
7.8 V
Figure 16-10. Flash Memory Programming Mode
...
n
1
Flash memory programming mode
MODE0 to MODE2
010
011
7.8 V
V
PP
3.3 V
0 V
RESET
2
16.6.3 Selection of communication mode
In the V850E/IA1, a communication mode is selected by inputting pulses (16 pulses max.) to V
PP
pin after switching
to the flash memory programming mode. The V
PP
pulse is generated by the dedicated flash programmer.
The following shows the relationship between the number of pulses and the communication mode.
Table 16-3. List of Communication Mode
V
PP
Pulse
Communication Mode
Remarks
0
CSI0
3
Handshake-supported CSI
V850E/IA1 performs slave operation, MSB first
8
UART0
Communication rate: 9600 bps (after reset), LSB first
Others
RFU (reserved)
Setting prohibited
Содержание V850E/IA1 mPD703116
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