CHAPTER 14 FLASH MEMORY (
µµµµ
PD70F3102, 70F3102A)
User’s Manual U12688EJ4V0UM00
419
14.6.2 Flash memory programming mode
When rewriting the contents of flash memory using the dedicated flash programmer, set the V850E/MS1 in the
flash memory programming mode. When switching modes, set the MODE0 to MODE2 and MODE3/V
PP
pins before
releasing reset.
When performing on-board writing, change modes using a jumper, etc.
•
MODE0: Low-level input
•
MODE1: High-level input
•
MODE2: Low-level input
•
MODE3/V
PP
: 7.8 V
…
n
1
Flash memory programming mode
MODE0 to MODE2
××
0
010
7.8 V
MODE3/V
PP
3 V
0 V
RESET
2
Remark
×
: don’t care
14.6.3 Selection of communication mode
In the V850E/MS1, 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 modes.
Table 14-1. List of Communication Modes
V
PP
Pulse
Communication Mode
Remarks
0
CSI0
V850E/MS1 performs slave operation, MSB first
8
UART0
Communication rate: 9600 bps (after reset), LSB first
Others
RFU (reserved)
Setting prohibited
Caution When UART0 is selected, the receive clock is calculated based on the reset command sent from
the dedicated flash programmer after receiving the V
PP
pulse.
Содержание V850E/MS1 UPD703100
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