HD6432646 Hitachi, HD6432646 Datasheet - Page 701

• Manufacturer Part Number: HD6432646
• Description: (HD64F264x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Note: * Determined by the state of the FWE pin.
Bit 7—Flash Write Enable Bit (FWE): Sets hardware protection against flash memory
programming/erasing.
Bit 7: FWE
0
1
Bit 6—Software Write Enable Bit (SWE): Enables or disables flash memory programming and
erasing. Set this bit when setting bits 5 to 0, bits 7 to 0 of EBR1, and bits 1 and 0 of EBR2.
Bit 6: SWE
0
1
Bit 5—Erase Setup Bit (ESU): Prepares for a transition to erase mode. Set this bit to 1 before
setting the E bit in FLMCR1 to 1. Do not set the SWE, PSU, EV, PV, E, or P bit at the same time.
Bit 5: ESU
0
1
Initial value:
R/W:
Description
When a low level is input to the FWE pin (hardware-protected state)
When a high level is input to the FWE pin
Description
Erase setup cleared
Erase setup
[Setting condition]
When FWE = 1 and SWE = 1
Bit:
Description
Writes disabled
Writes enabled
[Setting condition]
When FWE = 1
FWE
—*
7
R
SWE
R/W
6
0
ESU
R/W
5
0
PSU
R/W
4
0
R/W
EV
3
0
R/W
PV
2
0
R/W
1
E
0
(Initial value)
(Initial value)
R/W
0
P
0
667