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H8/3021 Datasheet(PDF) 651 Page - Renesas Technology Corp

Part # H8/3021
Description  16-Bit Single-Chip Microcomputer
PDF  712 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8/3021 Datasheet(HTML) 651 Page - Renesas Technology Corp

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Appendix B. Internal I/O Register Field
Rev.2.00 Mar. 22, 2007 Page 627 of 684
REJ09B0352-0200
TCSR—Timer Control/Status Register
H'A8
WDT
Bit
Initial value
Read/Write
7
OVF
0
R/(W)
6
WT/
0
R/W
5
TME
0
R/W
4
—
1
—
3
—
1
—
0
CKS0
0
R/W
2
CKS2
0
R/W
1
CKS1
0
R/W
Overflow flag
Timer mode select
IT
0
[Clearing condition]
Read OVF when OVF = 1, then write 0 in OVF
1
[Setting condition]
TCNT changes from H'FF to H'00
0
Interval timer: requests interval timer interrupts
1
Watchdog timer: generates a reset signal
Clock select 2 to 0
0
1
φ/2
φ/32
φ/64
φ/128
φ/256
φ/512
φ/2048
0
1
0
1
0
1
0
1
0
1
0
φ/4096
1
Timer enable
0
1
TCNT is initialized to H'00 and halted
TCNT is counting
Note: * Only 0 can be written to clear the flag.
*
CKS2 CKS1 CKS0 Description



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