HD6432621 Hitachi, HD6432621 Datasheet - Page 1028

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

FLMCR1—Flash Memory Control Register 1
984
Note: * Determined by the state of the FWE pin.
Bit
Initial value
Read/Write
Notes: 1. This register is not present in the mask ROM version, and an attempt to read it will return an undefined value.
Flash write enable bit
0 When a low level is input to the FWE pin (hardware-protected state)
1
When a high level is input to the FWE pin
2. To access this register, set the FLSHE bit to 1 in serial control register X (SCRX). Even if FLSHE = 1, if the chip
:
:
:
is in a mode in which the on-chip flash memory is disabled, a read will return H'00 and writes are invalid. Writes
to this register are also invalid when the FWE bit in FLMCR1 is not set to 1.
FWE
—*
R
7
Software write enable bit 1
SWE1
0 Writes disabled
1
R/W
Writes enabled
[Setting condition]
When FWE = 1
6
0
ESU1
Erase setup bit 1
R/W
0 Erase setup cleared
1
5
0
Erase setup
[Setting condition]
When FWE = 1 and SWE1 = 1
PSU1
R/W
Program setup bit 1
4
0
0 Program setup cleared
1
Program setup
[Setting condition]
When FWE = 1 and SWE1 = 1
H'FFA8
Erase-verify 1
0 Erase-verify mode cleared
1
R/W
EV1
3
0
Transition to erase-verify mode
[Setting condition]
When FWE = 1 and SWE1 = 1
Program-verify 1
0 Program-verify mode cleared
1
Transition to program-verify mode
[Setting condition]
When FWE = 1 and SWE1 = 1
Erase 1
R/W
PV1
0 Erase mode cleared
1
2
0
Transition to erase mode
[Setting condition]
When FWE = 1, SWE1 = 1,
and ESU1 = 1
Program 1
0 Program mode cleared
1
Transition to program mode
[Setting condition]
When FWE = 1, SWE1 = 1,
and PSU1 = 1
R/W
E1
1
0
R/W
P1
0
0
ROM