HD6432633 Datasheet, PDF (690/1453 Pages) Renesas Technology Corp – Series of Microcomputers (MCUs: microcomputer units)

Bits 2 to 0—Clock Select 2 to 0 (CKS2 to CKS0): These bits select whether the clock input to
TCNT is an internal or external clock.
Three internal clocks can be selected, all divided from the system clock (ø): ø/8, ø/64, and ø/8192.
The falling edge of the selected internal clock triggers the count.
When use of an external clock is selected, three types of count can be selected: at the rising edge,
the falling edge, and both rising and falling edges.
Some functions differ between channel 0 and channel 1.
Bit 2 Bit 1 Bit 0
CKS2 CKS1 CKS0 Description
0
0
0
Clock input disabled
(Initial value)
1
Internal clock, counted at falling edge of ø/8
1
0
Internal clock, counted at falling edge of ø/64
1
Internal clock, counted at falling edge of ø/8192
1
0
0
For channel 0: count at TCNT1 overflow signal*
For channel 1: count at TCNT0 compare match A*
For channel 2: count at TCNT3 overflow signal*
For channel 3: count at TCNT2 compare match A*
1
External clock, counted at rising edge
1
0
External clock, counted at falling edge
1
External clock, counted at both rising and falling edges
Note: * If the count input of channel 0 (channel 2) is the TCNT1 (TCNT3) overflow signal and that of
channel 1 (channel 3) is the TCNT0 (TCNT2) compare match signal, no incrementing clock
is generated. Do not use this setting.
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