Table 11.2 Clock Input to TCNT and Count Condition
Channel
Bit 2
CKS2
TMR_0
0
1
TMR_1
0
1
All
1
Note: * If the count input of TMR_0 is the TCNT_1 overflow signal and that of TMR_1 is the
TCNT_0 compare match signal, no incrementing clock is generated. This setting is
prohibited.
11.3.5
Timer Control/Status Registers (TCSR)
The TCSR registers display status flags, and control compare match output.
Rev. 3.0, 10/02, page 332 of 686
TCR
Bit 1
Bit 0
CKS1
CKS0
0
0
1
1
0
1
0
0
0
0
1
1
0
1
0
0
0
1
1
0
1
1
Description
Clock input disabled
Internal clock, counted at falling edge of ø/8
Internal clock, counted at falling edge of ø/64
Internal clock, counted at falling edge of ø/8192
Count at TCNT1 overflow signal*
Clock input disabled
Internal clock, counted at falling edge of ø/8
Internal clock, counted at falling edge of ø/64
Internal clock, counted at falling edge of ø/8192
Count at TCNT0 compare match A*
External clock, counted at rising edge
External clock, counted at falling edge
External clock, counted at both rising and falling
edges