HD6432646 Hitachi, HD6432646 Datasheet - Page 813
HD6432646
Manufacturer Part Number
HD6432646
Description
(HD64F264x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432646.pdf
(1155 pages)
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Item
Erase
Notes: *1 Make each time setting in accordance with the program or erase algorithm.
*2 Programming time per 128 bytes (Shows the total period for which the P-bit in the flash
*3 Block erase time (Shows the total period for which the E-bit in FLMCR1 is set. It does
*4 To specify the maximum programming time value (t P (max)) in the 128-byte
*5 For the maximum erase time (t
Examples: When t
memory control register (FLMCR1) is set. It does not include the programming
verification time.)
not include the erase verification time.)
programming algorithm, set the max. value (1000) for the maximum programming count
(N).
The wait time after P bit setting should be changed as follows according to the value of
the programming counter (n).
Programming counter (n) = 1 to 6:
Programming counter (n) = 7 to 1000:
[In additional programming]
Programming counter (n)= 1 to 6:
wait time after E bit setting (t
To set the maximum erase time, the values of (t
the above formula.
Wait time after H'FF dummy
write
Wait time after EV bit clear
Wait time after SWE bit clear
Maximum erase count
*1
t
When t
E
(max) = Wait time after E bit setting (t
s e
se
= 10 [ms], N = 120 times
= 100 [ms], N = 12 times
* 1* 5
* 1
*1
se
) and the maximum erase count (N):
E
(max)), the following relationship applies between the
Symbol
t
t
t
N
sevr
cev
cswe
t
t
t
sp30
sp200
sp10
Min
2
4
100
12
= 30 µs
= 10 µs
= 200 µs
se
) and (N) should be set so as to satisfy
se
Typ
2
4
100
—
) x maximum erase count (N)
Max
—
—
—
120
Unit
µs
µs
µs
Times
Test Condition
779
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