HD643303x Hitachi, HD643303x Datasheet - Page 196

• Manufacturer Part Number: HD643303x
• Description: Hitachi Microcomputer
• Manufacturer: Hitachi

8.2 Register Descriptions
8.2.1 Timer Start Register (TSTR)
TSTR is an 8-bit readable/writable register that starts and stops the timer counter (TCNT) in
channels 0 to 4.
TSTR is initialized to H'E0 by a reset and in standby mode.
Bits 7 to 5—Reserved: Read-only bits, always read as 1.
Bit 4—Counter Start 4 (STR4): Starts and stops timer counter 4 (TCNT4).
Bit 4
STR4
0
1
Bit 3—Counter Start 3 (STR3): Starts and stops timer counter 3 (TCNT3).
Bit 3
STR3
0
1
Bit 2—Counter Start 2 (STR2): Starts and stops timer counter 2 (TCNT2).
Bit 2
STR2
0
1
Bit
Initial value
Read/Write
TCNT4 is halted
TCNT4 is counting
TCNT3 is halted
TCNT3 is counting
TCNT2 is halted
TCNT2 is counting
Description
Description
Description
—
—
7
1
Reserved bits
—
—
6
1
—
—
5
1
181
STR4
R/W
4
0
STR3
R/W
3
0
Counter start 4 to 0
These bits start and
stop TCNT4 to TCNT0
STR2
R/W
2
0
STR1
R/W
1
0
(Initial value)
(Initial value)
(Initial value)
STR0
R/W
0
0