Hitachi F-ZTAT H8/3039 Series Hardware Manual page 227

Bit 7—Reserved: This bit cannot be modified and is always read as 1.
Bits 6 to 4—I/O Control B2 to B0 (IOB2 to IOB0): These bits select the GRB function.
Bit 6 Bit 5
IOB2 IOB1
0 0
1
1 0
1
Notes: 1. After a reset, the output is 0 until the first compare match.
2. Channel 2 output cannot be toggled by compare match. This setting selects 1 output
instead.
Bit 3—Reserved: This bit cannot be modified and is always read as 1.
Bits 2 to 0—I/O Control A2 to A0 (IOA2 to IOA0): These bits select the GRA function.
Bit 2 Bit 1
IOA2 IOA1
0 0
1
1 0
1
Notes: 1. After a reset, the output is 0 until the first compare match.
2. Channel 2 output cannot be toggled by compare match. This setting selects 1 output
instead.
Bit 4
IOB0 Function
0 GRB is an output
1 compare register
0
1
0 GRB is an input
1 capture register
0
1
Bit 0
IOA0 Function
0 GRA is an outpurt
1 compare register
0
1
0 GRA is an input
1 capture register
0
1
No output at compare match
0 output at GRB compare match*
1 output at GRB compare match*
Output toggles at GRB compare match
(1 output in channel 2)*
GRB captures rising edge of input
GRB captures falling edge of input
GRB captures both edges of input
No output at compare match
0 output at GRA compare match*
1 output at GRA compare match*
Output toggles at GRA compare match
(1 output in channel 2) *
GRA captures rising edge of input
GRA captures falling edge of input
GRA captures both edges of input
(Initial value)
1
1
1 2
, *
(Initial value)
1
1
1, 2
*
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