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C8051F380/1/2/3/4/5/6/7/C
SFR Definition 27.3. PCA0CPMn: PCA Capture/Compare Mode
Bit
Name
Type
Reset
7
PWM16n
R/W
0
6
ECOMn
R/W
0
5
CAPPn
R/W
0
4
CAPNn
R/W
0
3
MATn
R/W
0
2
TOGn
R/W
0
1
PWMn
R/W
0
0
ECCFn
R/W
0
SFR Addresses: 0xDA (n = 0), 0xDB (n = 1), 0xDC (n = 2), 0xDD (n = 3), 0xDE (n = 4)
SFR Pages: All Pages (n = 0), All Pages (n = 1), All Pages (n = 2), All Pages (n = 3), All Pages (n = 4)
Bit Name Function
7
PWM16n 16-bit Pulse Width Modulation Enable.
This bit enables 16-bit mode when Pulse Width Modulation mode is enabled.
0: 8-bit PWM selected.
1: 16-bit PWM selected.
6
5
4
3
2
1
0
ECOMn
CAPPn
CAPNn
MATn
TOGn
PWMn
ECCFn
Comparator Function Enable.
This bit enables the comparator function for PCA module n when set to 1.
Capture Positive Function Enable.
This bit enables the positive edge capture for PCA module n when set to 1.
Capture Negative Function Enable.
This bit enables the negative edge capture for PCA module n when set to 1.
Match Function Enable.
This bit enables the match function for PCA module n when set to 1. When enabled,
matches of the PCA counter with a module's capture/compare register cause the CCFn
bit in PCA0MD register to be set to logic 1.
Toggle Function Enable.
This bit enables the toggle function for PCA module n when set to 1. When enabled,
matches of the PCA counter with a module's capture/compare register cause the logic
level on the CEXn pin to toggle. If the PWMn bit is also set to logic 1, the module oper-
ates in Frequency Output Mode.
Pulse Width Modulation Mode Enable.
This bit enables the PWM function for PCA module n when set to 1. When enabled, a
pulse width modulated signal is output on the CEXn pin. 8-bit PWM is used if PWM16n
is cleared; 16-bit mode is used if PWM16n is set to logic 1. If the TOGn bit is also set,
the module operates in Frequency Output Mode.
Capture/Compare Flag Interrupt Enable.
This bit sets the masking of the Capture/Compare Flag (CCFn) interrupt.
0: Disable CCFn interrupts.
1: Enable a Capture/Compare Flag interrupt request when CCFn is set.
Note: When the WDTE bit is set to 1, the PCA0CPM4 register cannot be modified, and module 4 acts as the
watchdog timer. To change the contents of the PCA0CPM4 register or the function of module 4, the Watchdog
Timer must be disabled.
Rev. 1.4
313
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