HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 600
HD6433044
Manufacturer Part Number
HD6433044
Description
(HD64 Series) Hitachi Single-Chip Microcomputer
Manufacturer
Hitachi Semiconductor
Datasheet
1.HD6433044.pdf
(867 pages)
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18.7.3 Programming Flowchart and Sample Program
Flowchart for Programming One Byte
(set bit of block to be programmed to 1)
(clear bit of programmed block to 0)
Wait initial value setting x = 15 s
Write data to flash memory (flash
End (1-byte data programmed)
memory latches write address
Select program-verify mode
Clear erase block register
Enable watchdog timer
(V
Disable watchdog timer
Set erase block register
(PV bit = 1 in FLMCR)
Verify (read memory)
PP
Select program mode
(P bit = 1 in FLMCR)
E bit = 1 in FLMCR)
Clear
Wait (t
Set V
Clear PV bit
and data)
Wait (z) s
Wait (x) s
Clear P bit
Start
n = 1
V
PP
VS1
PP
OK
E bit
E
) s
*1
bit
*2
*3
Figure 18-15 Programming Flowchart
No good
Programming ends
591
Clear erase block register
(clear bit of block to be
Programming error
programmed to 0)
Clear
Clear PV bit
n
V
N?
PP
Yes
Notes: 1. Write the data to be programmed using a
E
bit
2. Set the watchdog timer overflow interval
3. Read to verify data from the memory
4. t
5. Programming time x, which is determined
byte transfer instruction.
by setting CKS2 and CKS1 to 0 and
CKS0 to 1.
using a byte transfer instruction.
z:
N:
by the initial time
increases in proportion to n. Thus, set the
initial time to 15.8 µs or less to make total
programming time 1 ms or less.
VS1
Verify ends
No
: 4 µs
5 to 10 µs
6 (set N so that total programming
time does not exceed 1 ms)
Double the programming
time (x
n + 1
2
n–1
(n = 1 to 6),
2
n
x)
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