Hitachi H8/3692 ユーザーズマニュアル

Rev. 1.0, 07/01, page 159 of 372

TIOR0 selects the functions of GRA and GRB, and specifies the functions of the FTIOA and
FTIOB pins.

7

−

1

−

Reserved

This bit is always read as 1 and cannot be modified.

6

IOB2

0

R/W

I/O Control B2

Selects the GRB function.

0: GRB functions as an output compare register

1: GRB functions as an input capture register

5

4

IOB1

IOB0

0

0

R/W

R/W

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

3

−

1

−

Reserved

This bit is always read as 1 and cannot be modified.

2

IOA2

0

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

1

0

IOA1

IOA0

0

0

R/W

R/W

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

Legend  X: Don't care.