HD6432621 Hitachi, HD6432621 Datasheet - Page 449

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

WDT1 Input Clock Select*
Bit 4
PSS
0
1
Notes: *1 An overflow period is the time interval between the start of counting up from H'00 on the
*2 Cannot be used in the H8S/2623 Series.
Bit 2
CKS2
0
1
0
1
TCNT and the occurrence of a TCNT overflow.
Bit 1
CKS1
0
1
0
1
0
1
0
1
Bit 0
CKS0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
2
Clock
ø/2 (Initial value)
ø/64
ø/128
ø/512
ø/2048
ø/8192
ø/32768
ø/131072
øSUB/2
øSUB/4
øSUB/8
øSUB/16
øSUB/32
øSUB/64
øSUB/128
øSUB/256
Overflow Period*
(where ø SUB = 32.768 kHz)
25.6 µs
819.2 µs
1.6 ms
6.6 ms
26.2 ms
104.9 ms
419.4 ms
1.68 s
15.6 ms
31.3 ms
62.5 ms
125 ms
250 ms
500 ms
1 s
2 s
Description
1
(where ø = 20 MHz)
405