Register Descriptions; Timer Start Register (Tstr) - Hitachi H8/3006 Hardware Manual

9.2

Register Descriptions

9.2.1

Timer Start Register (TSTR)

TSTR is an 8-bit readable/writable register that starts and stops the timer counter (16TCNT) in
channels 0 to 2.
Bit 7
—
Initial value
1
Read/Write —
TSTR is initialized to H'F8 by a reset and in standby mode.
Bits 7 to 3—Reserved: These bits cannot be modified and are always read as 1.
Bit 2—Counter Start 2 (STR2): Starts and stops timer counter 2 (16TCNT2).
Bit 2
STR2 Description
0 16TCNT2 is halted
1 16TCNT2 is counting
Bit 1—Counter Start 1 (STR1): Starts and stops timer counter 1 (16TCNT1).
Bit 1
STR1 Description
0 16TCNT1 is halted
1 16TCNT1 is counting
Bit 0—Counter Start 0 (STR0): Starts and stops timer counter 0 (16TCNT0).
Bit 0
STR0 Description
0 16TCNT0 is halted
1 16TCNT0 is counting
288
6 5 4
— — —
1 1 1
— — —
Reserved bits
3 2 1
—
STR2 STR1
1 0 0
— R/W R/W
Counter start 2 to 0
These bits start and
stop 16TCNT2 to 16TCNT0
0
STR0
0
R/W
(Initial value)
(Initial value)
(Initial value)