Hitachi SH7032 - Page 280

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• Bits 6–4 (I/O Control B2–B0 (IOB2–IOB0)): IOB2–IOB0 selects the GRB function.
Bit 6:
IOB2
Bit 5:
IOB1
Bit 4:
IOB0
GRB
Function
0 0 0 Compare match with pin output disabled (Initial value)
1 0 output at GRB compare match
*
1
1 0 1 output at GRB compare match
*
1
1 Output toggles at GRB compare match (1 output for
channel 2 only)
*
1
*
2
1 0 0 GRB captures rising edge of input
1 GRB captures falling edge of input
1 0 GRB captures both edges of input
1
Notes: *1 After reset, the value output is 0 until the first compare match occurs.
*2 Channel 2 has no compare-match driven toggle output function. If it is set for toggle, 1
is automatically selected as the output.
• Bit 3 (Reserved): Bit 3 always is read as 1. The write value should always be 1.
• Bits 2–0 (I/O Control A2–A0 (IOA2–IOA0)): IOA2–IOA0 select the GRB function.
Bit 2:
IOA2
Bit 1:
IOA1
Bit 0:
IOA0
GRA
Function
0 0 0 Compare match with pin output disabled (Initial value)
1 0 output at GRA compare match
*
1
1 0 1 output at GRA compare match
*
1
1 Output toggles at GRA compare match (1 output for
channel 2 only)
*
1
*
2
1 0 0 GRA captures rising edge of input
1 GRA captures falling edge of input
1 0 GRA captures both edges of input
1
Notes: *1 After reset, the value output is 0 until the first compare match occurs.
*2 Channel 2 has no compare-match driven toggle output function. If it is set for toggle, 1
is automatically selected as the output.
GRB is an
output
compare
register
GRB is an
input capture
register
GRA is an
output
compare
register
GRA is an
input capture
register