HD6433045 HITACHI [Hitachi Semiconductor], HD6433045 Datasheet - Page 605

• Manufacturer Part Number: HD6433045
• Description: Hitachi Single-Chip Microcomputer
• Manufacturer: HITACHI [Hitachi Semiconductor]

Prewrite Flowchart
(clear bit of block to be erased to 0)
Wait initial value setting x = 15 s
(set bit of block to be erased to 1)
write address and write data)
Write H'00 to flash memory
Clear erase block register
(
Enable watchdog timer
(set P bit to 1 in FLMCR)
Address = top address
Set erase block register
V
Disable watchdog timer
(flash memory latches
Select program mode
PP
(read data = H'00?)
Prewrite verify
End of prewrite
E
Clear
Wait (t
Last address?
Set
OK
bit = 1 in FLMCR)
Wait (z) s
Wait (x) s
Clear P bit
n = 1
Start
V
V
PP
VS1
PP
E
) s
E
Yes
bit
bit
*3
*2
*1
Figure 18-17 Prewrite Flowchart
No good
No
Programming ends
(clear bit of block to be erased to 0)
Clear erase block register
Programming error
Notes: 1. Use a byte transfer instruction.
Clear V
596
n
2. Set the watchdog timer overflow
3. In prewrite-verify mode P, E, PV,
4. t
N?
PP
Yes
E bit
interval by setting CKS2 = 0,
CKS1 = 0 and CKS0 = 0.
and EV are all cleared to 0 and
12 V is applied to V
transfer instruction.
z:
N:
VS1
: 4 µs
5 to 10 µs
6 (set N so that total
programming time does not
exceed 1 ms)
No
PP
the programming
time (x
. Use a byte
n + 1
Double
2
n
Address + 1
x)
address