HD64F3670 Datasheet, PDF (155/305 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

11.3.5 Timer I/O Control Register 0(TIOR0)
TIOR0 selects the functions of GRA and GRB, and specifies the functions of the FTIOA and
FTIOB pins.
Bit Bit Name Initial Value R/W
7−
1
−
6 IOB2
0
R/W
5 IOB1
0
R/W
4 IOB0
0
R/W
3−
1
−
2 IOA2
0
R/W
1 IOA1
0
R/W
0 IOA0
0
R/W
Legend X: Don't care.
Description
Reserved
This bit is always read as 1 and cannot be modified.
I/O Control B2
Selects the GRB function.
0: GRB functions as an output compare register
1: GRB functions as an input capture register
I/O Control B1 and B0
When IOB2=0,
00: No output at compare match
01: 0 output to the FTIOB pin at GRB compare match
10: 1 output to the FTIOB pin at GRB compare match
11: output toggles to the FTIOB pin at GRB compare match
When IOB2=1,
00: Input capture at rising edge at the FTIOB pin
01: Input capture at falling edge at the FTIOB pin
1X: Input capture at rising edge and falling edge at the
FTIOB pin
Reserved
This bit is always read as 1 and cannot be modified.
I/O Control A2
Selects the GRA function.
0: GRA functions as an output compare register
1: GRA functions as an input capture register
I/O Control A1 and A0
When IOA2=0,
00: No output at compare match
01: 0 output to the FTIOA pin at GRA compare match
10: 1 output to the FTIOA pin at GRA compare match
11: Output toggles to the FTIOA pin at GRA compare
match
When IOA2=1,
00: Input capture at rising edge of the FTIOA pin
01: Input capture at falling edge of the FTIOA pin
1X: Input capture at rising edge and falling edge of the
FTIOA pin
Rev. 1.0, 03/01, page 131 of 280