HD64F3664BPV Datasheet, PDF (224/446 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

Section 13 Watchdog Timer
13.2.3 Timer Mode Register WD (TMWD)
TMWD selects the input clock.
Bit
7 to 4
Bit Name

Initial
Value
All 1
3
CKS3
1
2
CKS2
1
1
CKS1
1
0
CKS0
1
[Legend]
X: Don't care.
R/W Description

Reserved
These bits are always read as 1.
R/W Clock Select 3 to 0
R/W Select the clock to be input to TCWD.
R/W 1000: Internal clock: counts on φ/64
R/W 1001: Internal clock: counts on φ/128
1010: Internal clock: counts on φ/256
1011: Internal clock: counts on φ/512
1100: Internal clock: counts on φ/1024
1101: Internal clock: counts on φ/2048
1110: Internal clock: counts on φ/4096
1111: Internal clock: counts on φ8192
0XXX: Internal oscillator
For the internal oscillator overflow periods, see section
20, Electrical Characteristics.
Rev. 6.00 Mar. 24, 2006 Page 194 of 412
REJ09B0142-0600