Rev. 2.00, 09/03, page 338 of 690
14.3.3
Timer I/O Control Registers (TIOR)
TIOR are 16-bit registers that control the TO pin.
TIOR register settings should be made only when TCNT operation is stopped.
Care is required since TIOR is affected by the TMDR setting.
Bit
Bit Name
Initial
Value
R/W
Description
15 to 3
0
R
Reserved
These bits are always read as 0 and cannot be modified.
2
1
0
IOA2
IOA1
IOA0
0
0
0
R/W
R/W
R/W
I/O Control
Bits IOA2 to IOA0 specify the functions of TGRA and the TO
pin. For details, refer to table 14.5.
Table 14.5
IOA2 to IOA0
Bit 2
Bit 1
Bit 0
Channel IOA2
IOA1
IOA0
Description
0
Always 0 output
0
1
0 output at TGRA compare match
*
0
1 output at TGRA compare match
0
1
1
Initial output is 0
output for TO pin
Toggle output at TGRA compare match
*
0
Always 1 output
0
1
0 output at TGRA compare match
0
1 output at TGRA compare match
*
0 to 3
1
1
1
Initial output is 1
output for TO pin
Toggle output at TGRA compare match
*
Note:
*
This setting is invalid in PWM mode.
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