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CHAPTER 13 16-Bit I/O TIMER
Table 13.3-4 Functions of Input Capture Control Status Register (ICS)
Bit name Function
bit7 ICPm:
Valid edge detection flag bit m
This bit is set to "1" when the valid edge is detected by the INm pin.
When the interrupt request of the input capture m is set to enable
(ICSnm:ICEm=1), if the ICPm bit is set, the interrupt request is generated.
When set to "0": The bit is cleared.
When set to "1": No effect.
bit6 ICPn:
Valid edge detection flag bit n
This bit is set to "1" when the valid edge is detected by the INn pin.
When the interrupt request of the input capture m is set to enable
(ICSnm:ICEn=1), if the ICPn bit is set, the interrupt request is generated.
When set to "0": The bit is cleared.
When set to "1": No effect.
bit5 ICEm:
Capture interrupt enable bit m
This bit enables or disables the interrupt request of the input capture m.
When set to "1": When the valid edge detection flag bit m is set to "1"
(ICSnm: ICPm=1), the interrupt request is generated.
bit4 ICEn:
Capture interrupt enable bit n
This bit enables or disables the interrupt request of the input capture n.
When set to "1": When the valid edge detection flag bit n is set to "1"
(ICSnm: ICPn=1), the interrupt request is generated.
bit3
bit2
EGm1, EGm0:
Edge select bits m
For the input capture register m, the trigger edge of the capture operation is
set.
• Setting of the trigger edge is used to specify enable and stop of the opera-
tion.
When set to "00
B
": The operation of input capture is disabled and no edge
is detected.
bit1
bit0
EGn1, EGn0:
Edge select bits n
For the input capture register n, the trigger edge of the capture operation is
set.
• Setting of the trigger edge is used to specify enable and stop of the opera-
tion.
When set to "00
B
": The operation of input capture is disabled and no edge
is detected.
n = 0, 2 m = n + 1