Timer Synchro Register (Tsnc) - Hitachi H8/3022 Hardware Manual

Bit 1—Counter Start 1 (STR1): Starts and stops timer counter 1 (TCNT1).
Bit 1
STR1 Description
0 TCNT1 is halted
1 TCNT1 is counting
Bit 0—Counter Start 0 (STR0): Starts and stops timer counter 0 (TCNT0).
Bit 0 Description
STR0
0 TCNT0 is halted
1 TCNT0 is counting

8.2.2 Timer Synchro Register (TSNC)

TSNC is an 8-bit readable/writable register that selects whether channels 0 to 4 operate
independently or synchronously. Channels are synchronized by setting the corresponding bits to 1.
Bit
Initial value
Read/Write
TSNC is initialized to H'E0 by a reset and in standby mode.
Bits 7 to 5—Reserved: These bits cannot be modified and are always read as 1.
Bit 4—Timer Sync 4 (SYNC4): Selects whether channel 4 operates independently or
synchronously.
Bit 4
SYNC4 Description
0 Channel 4's timer counter (TCNT4) operates independently
TCNT4 is preset and cleared independently of other channels
1 Channel 4 operates synchronously
TCNT4 can be synchronously preset and cleared
7 6
— —
1 1
— —
Reserved bits
5 4
— SYNC4 SYNC3
1 0
— R/W R/W
3 2
SYNC2 SYNC1
0 0
R/W R/W
Timer sync 4 to 0
These bits synchronize
channels 4 to 0
(Initial value)
(Initial value)
1 0
SYNC0
0 0
R/W
(Initial value)
195