Rev. 1.0, 09/02, page 173 of 568
10.3.3
Timer I/O Control Register (TIOR)
The TIOR registers are 8-bit readable/writable registers that control the TGR registers. The TPU
has eight TIOR registers, two each for channels 0 and 3, and one each for channels 1, 2, 4, and 5.
Care is required as TIOR is affected by the TMDR setting. The initial output specified by TIOR is
valid when the counter is stopped (the CST bit in TSTR is cleared to 0). Note also that, in PWM
mode 2, the output at the point at which the counter is cleared to 0 is specified.
When TGRC or TGRD is designated for buffer operation, this setting is invalid and the register
operates as a buffer register.
•
TIORH_0, TIOR_1, TIOR_2, TIORH_3, TIOR_4, TIOR_5
Bit
Bit Name
Initial
value
R/W
Description
7
6
5
4
IOB3
IOB2
IOB1
IOB0
0
0
0
0
R/W
R/W
R/W
R/W
I/O Control B0 to B3
Specify the function of TGRB.
3
2
1
0
IOA3
IOA2
IOA1
IOA0
0
0
0
0
R/W
R/W
R/W
R/W
I/O Control A0 to A3
Specify the function of TGRA.
•
TIORL_0, TIORL_3
Bit
Bit Name
Initial
value
R/W
Description
7
6
5
4
IOD3
IOD2
IOD1
IOD0
0
0
0
0
R/W
R/W
R/W
R/W
I/O Control D0 to D3
Specify the function of TGRD.
3
2
1
0
IOC3
IOC2
IOC1
IOC0
0
0
0
0
R/W
R/W
R/W
R/W
I/O Control C0 to C3
Specify the function of TGRC.
Summary of Contents for H8S/2627
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