CHAPTER 16 FLASH MEMORY (
µµµµ
PD70F3107A)
519
User’s Manual U14359EJ4V0UM
16.6.2 Flash memory programming mode
When rewriting the contents of flash memory using the dedicated flash programmer, set the V850E/MA1 in the
flash memory programming mode. To switch to this mode, set the MODE0 to MODE1 and MODE2/V
PP
pins before
releasing reset.
When performing on-board writing, switch modes using a jumper, etc.
•
MODE0:
High-level or low-level input
•
MODE1:
High-level input
•
MODE2/V
PP
: 7.8 V
...
n
1
Flash memory programming mode
MODE0, MODE1
1, 0
1, 1
7.8 V
MODE2/V
PP
3 V
0 V
RESET
2
16.6.3 Selection of communication mode
In the V850E/MA1, the communication mode is selected by inputting pulses (16 pulses max.) to the 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 Modes
V
PP
Pulse
Communication Mode
Remarks
0
CSI0
3
Handshake-supporting CSI
V850E/MA1 performs slave operation, MSB first
Other
RFU (reserved)
Setting prohibited