HD64F2145 Datasheet, PDF (369/829 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

Bit Bit Name Initial Value R/W Description
2
CKS2 0
R/W Clock Select 2 to 0
1
CKS1 0
0
CKS0 0
R/W Selects the clock source to be input to. The overflow
R/W ^{frequency for ø = 10 MHz is enclosed in parentheses.}
000: ø/2 (frequency: 51.2 µs)
001: ø/64 (frequency: 1.64 ms)
010: ø/128 (frequency: 3.28 ms)
011: ø/512 (frequency: 13.1 ms)
100: ø/2048 (frequency: 52.4 ms)
101: ø/8192 (frequency: 209.7 ms)
110: ø/32768 (frequency: 0.84 s)
111: ø/131072 (frequency: 3.36 s)
Notes: 1. Only 0 can be written, to clear the flag.
2. When OVF is polled with the interval timer interrupt disabled, OVF = 1 must be read at
least twice.
Rev. 2.0, 08/02, page 329 of 788