CHAPTER 15 FLASH MEMORY (
µ
PD70F3114)
612
User’s Manual U15195EJ5V0UD
15.6.2 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 and MODE1/V
PP
pins before canceling reset.
When performing on-board writing, change modes using a jumper, etc.
•
MODE0:
High-level
input
•
MODE1/V
PP
: 7.8 V
Figure 15-10. Flash Memory Programming Mode
...
n
1
Flash memory programming mode
7.8 V
MODE1/V
PP
3.3 V
0 V
RESET
2
15.6.3 Selection of communication mode
In the V850E/IA2, 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 15-4. List of Communication Mode
V
PP
Pulse
Communication Mode
Remarks
0 CSI0
3 Handshake-supported
CSI
V850E/IA2 performs slave operation, MSB first
8
UART0
Communication rate: 9600 bps (after reset), LSB first
Others
RFU (reserved)
Setting prohibited