h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 821

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Notes: 1. Make each time setting in accordance with the program or erase algorithm.
Item
Erase
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).
wait time after E bit setting (t
To set the maximum erase time, the values of (t
the above formula.
Wait time after SWE bit setting *
Wait time after ESU bit setting *
Wait time after E bit setting *
Wait time after E bit clear *
Wait time after ESU bit clear *
Wait time after EV bit setting *
Wait time after H'FF dummy
write *
Wait time after EV bit clear *
Wait time after SWE bit clear *
Maximum erase count *
1
Programming counter (n) = 1 to 6:
Programming counter (n) = 7 to 1000: t
[In additional programming]
Programming counter (n)= 1 to 6:
t
When t
E
(max) = Wait time after E bit setting (t
se
se
= 100 [ms], N = 12 times
= 10 [ms], N = 120 times
1
*
5
1
1
1
*
se
1
1
5
1
) and the maximum erase count (N):
1
1
E
(max)), the following relationship applies between the
Symbol
t
t
t
t
t
t
t
t
t
N
sswe
sesu
se
ce
cesu
sev
sevr
cev
cswe
Min
1
100
10
10
10
20
2
4
100
12
Rev. 5.00 Sep 22, 2005 page 795 of 1136
se
) and (N) should be set so as to satisfy
se
t
t
Section 23 Electrical Characteristics
sp30
sp200
sp10
Typ
1
100
10
10
10
20
2
4
100
—
) x maximum erase count (N)
= 30 µs
= 10 µs
= 200 µs
Max
—
—
100
—
—
—
—
—
—
120
Unit
µs
µs
ms
µs
µs
µs
µs
µs
µs
Times
REJ09B0257-0500
Test
Condition
Erase time
wait