Rev. 2.00, 09/03, page 312 of 690
12.3.1
Timer Start Register (TSTR)
TSTR is an 8-bit readable/writable register that selects whether to run or halt the timer counters
(TCNT).
TSTR is initialized by satisfying the initialization conditions shown in section 24, List of
Registers, changing the multiplication ratio of PLL1, or setting the MSTP2 bit in STBCR to 1.
Bit
Bit Name
Initial Value
R/W
Description
7 to 3
0
R
Reserved
These bits are always read as 0. The write value should
always be 0.
2
STR2
0
R/W
Counter Start 2
Selects whether to run or halt timer counter 2
(TCNT_2).
0: TCNT_2 count halted
1: TCNT_2 counts
1
STR1
0
R/W
Counter Start 1
Selects whether to run or halt timer counter 1
(TCNT_1).
0: TCNT_1 count halted
1: TCNT_1 counts
0
STR0
0
R/W
Counter Start 0
Selects whether to run or halt timer counter 0
(TCNT_0).
0: TCNT_0 count halted
1: TCNT_0 counts
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