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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
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
:
7.8 V
PP
MODE0 to MODE2
010
7.8 V
V
3.3 V
PP
0 V
RESET
16.6.3 Selection of communication mode
In the V850E/IA1, a communication mode is selected by inputting pulses (16 pulses max.) to V
to the flash memory programming mode. The V
The following shows the relationship between the number of pulses and the communication mode.
V
Pulse
Communication Mode
PP
0
CSI0
3
Handshake-supported CSI
8
UART0
Others
RFU (reserved)
CHAPTER 16 FLASH MEMORY ( µ µ µ µ PD70F3116)
Figure 16-10. Flash Memory Programming Mode
011
pulse is generated by the dedicated flash programmer.
PP
Table 16-3. List of Communication Mode
V850E/IA1 performs slave operation, MSB first
Communication rate: 9600 bps (after reset), LSB first
Setting prohibited
User's Manual U14492EJ3V0UD
pins before
PP
Flash memory programming mode
1
2
...
n
pin after switching
PP
Remarks
737
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