Renesas H8S/2111B User Manual
Page 229

Rev. 1.00, 05/04, page 195 of 544
Table 10.3 Clock Input to TCNT and Count Condition (3)
TCR
TCRAB
Channel
CKS2 CKS1 CKS0 CKSA CKSB Description
TMR_B
0 0 0 — 0 Disables
clock
input
0 0 1 — 0 Increments
at
φ/4
0 1 0 — 0 Increments
at
φ/256
0 1 1 — 0 Increments
at
φ/2048
1 0 0 — 0 Disables
clock
input
0 0 0 — 1 Disables
clock
input
0 0 1 — 1 Increments
at
φ/4096
0 1 0 — 1 Increments
at
φ/8192
0 1 1 — 1 Increments
at
φ/16384
1
0
0
—
1
Increments at overflow signal from
TCNT_A*
1
0
1
—
—
Increments at rising edge of external
clock
1
1
0
—
—
Increments at falling edge of external
clock
1
1
1
—
—
Increments at both rising and falling
edges of external clock
TMR_A
0 0 0 0 — Disables
clock
input
0 0 1 0 — Increments
at
φ
0 1 0 0 — Increments
at
φ/2
0 1 1 0 — Increments
at
φ/4
1 0 0 0 — Disables
clock
input
0 0 0 1 — Disables
clock
input
0 0 1 1 — Increments
at
φ/2048
0 1 0 1 — Increments
at
φ/4096
0 1 1 1 — Increments
at
φ/8192
1
0
0
1
—
Increments at compare-match A from
TCNT_B*
1
0
1
—
—
Increments at rising edge of external
clock
1
1
0
—
—
Increments at falling edge of external
clock
1
1
1
—
—
Increments at both rising and falling
edges of external clock
Notes: * If the TMR_B clock input is set as the TCNT_A overflow signal and the TMR_A clock
input is set as the TCNT_B compare-match signal simultaneously, a count-up clock
cannot be generated. These settings should not be made.