HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 634

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

(b) The V
bit in FLMCR is set or cleared while a voltage of 12.0 ± 0.6 V is being applied to the V
After the V
and the EV, PV, E, and P bits in FLMCR. Accordingly, program or erase flash memory 5 to 10 µs
after the V
are cleared. Be sure that these bits are not set by mistaken access to FLMCR.
ø
V
V
MD2
RES
V
CC
PP
PP
E bit
2.7 to 5.5 V
0 to Vcc V
0 to Vcc V
PP
PP
PP
E bit is set. V
bit in the flash memory control register (FLMCR) is set or cleared when the V
E bit is set, it becomes possible to write the erase block registers (EBR1 and EBR2)
12 0.6 V
Figure 18-28 Power-On and Power-Off Timing (Boot Mode)
* t
min 0 s
Period during which flash memory access is prohibited
Period during which flash memory can be rewritten
(Execution of program in flash memory prohibited, and data reads other than verify
operations prohibited)
VPS
12 0.6 V
tosc1
: 5 to 10 s
PP
should be turned off only when the P, E and V
min 0 s
t
MDS
VppE
set
t
VPS
*
625
Programming/
erasing
possible
t
FRS
VppE
cleared
min 10 ø
min 0 s
PP
E bits in FLMCR
0 to Vcc V
0 to Vcc V
PP
pin.
PP
E