HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 583

• Manufacturer Part Number: HD6433044
• Description: (HD64 Series) Hitachi Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

18.5 Flash Memory Register Descriptions
18.5.1 Flash Memory Control Register
The flash memory control register (FLMCR) is an eight-bit register that controls the flash memory
operating modes. Transitions to program mode, erase mode, program-verify mode, and erase-
verify mode are made by setting bits in this register. FLMCR is initialized to H'00 by a reset, in
the standby modes, and when 12 V is not applied to V
entry to a standby mode initializes FLMCR to H'80.
Note: * The initial value is H'00 in modes 5, 6, and 7 (on-chip flash memory enabled). In modes
Bit
Initial value
R/W
1, 2, 3, and 4 (on-chip flash memory disabled), this register cannot be modified and is
always read as H'FF.
*
V
R
7
0
PP
Programming power
Status flag indicating the
power to V
V
R/W
PP
6
0
E
V
Disables or enables 12-V
application to V
PP
PP
enable
—
—
5
0
Reserved bits
—
—
4
0
PP
574
pin
PP
R/W
EV
3
0
. When 12 V is applied to V
*
Erase-verify mode
Designates transition to
or exit from erase-verify
mode
R/W
PV
2
0
*
Program-verify mode
Designates transition to
or exit from program-verify
mode
R/W
1
E
0
Erase mode
Designates transition
to or exit from erase
mode
*
Program mode
Designates
transition to
or exit from
program mode
R/W
0
P
0
PP
, a reset or
*