h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 317

• Manufacturer Part Number: h8s-2172
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family H8s-2100 Series
• Manufacturer: Renesas Electronics Corporation.

Notes: 1. Only 0 can be written to clear the flag.
Bit
5
4
3
2
1
0
2. When the OVF flag is polled with the interval timer interrupt disabled, OVF = 1 must be
Bit Name
TME
—
RST/NMI
CKS2
CKS1
CKS0
read at least twice.
Initial
Value
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
Timer Enable
When this bit is set to 1, TCNT starts counting.
When this bit is cleared, TCNT stops counting and is
initialized to H'00.
Reserved
The initial value should not be changed.
Reset or NMI
Selects to request an internal reset or an NMI interrupt
when TCNT has overflowed.
0: An NMI interrupt is requested
1: An internal reset is requested
Clock Select 2 to 0
Selects the clock source to be input to. The overflow
frequency for φ = 33 MHz is enclosed in parentheses.
000: φ/2 (frequency: 15.5 µs)
001: φ/64 (frequency: 496.4 µs)
010: φ/128 (frequency: 992.9 µs)
011: φ/512 (frequency: 3.9 ms)
100: φ/2048 (frequency: 15.8 ms)
101: φ/8192 (frequency: 63.5 ms)
110: φ/32768 (frequency: 254.2 ms)
111: φ/131072 (frequency: 1.01 s)
Rev. 2.00, 03/04, page 285 of 534