HD64F3670 Datasheet, PDF (157/323 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
Description
Reserved
This bit is always read as 1.
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 and falling edges of the FTIOB
pin
3
1
2 IOA2
0
1 IOA1
0
0 IOA0
0
Legend X: Don't care.
 Reserved
This bit is always read as 1.
R/W I/O Control A2
Selects the GRA function.
0: GRA functions as an output compare register
1: GRA functions as an input capture register
R/W I/O Control A1 and A0
R/W 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 and falling edges of the FTIOA
pin
Rev. 2.0, 03/02, page 133 of 298