Rev. 1.2
175
C8051T600/1/2/3/4/5/6
SFR Addresses: PCA0CPM0 = 0xDA, PCA0CPM1 = 0xDB, PCA0CPM2 = 0xDC
SFR Definition 26.3. PCA0CPMn: PCA Capture/Compare Mode
Bit
76543210
Name
PWM16n
ECOMn
CAPPn
CAPNn
MATn
TOGn
PWMn
ECCFn
Type
R/W
Reset
00000000
Bit
Name
Function
7PWM16n 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.
6ECOMn
Comparator Function Enable.
This bit enables the comparator function for PCA module n when set to 1.
5
CAPPn
Capture Positive Function Enable.
This bit enables the positive edge capture for PCA module n when set to 1.
4
CAPNn
Capture Negative Function Enable.
This bit enables the negative edge capture for PCA module n when set to 1.
3MATn
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.
2TOGn
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.
1PWMn
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. The 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.
0ECCFn
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 PCA0CPM2 register cannot be modified, and module 2 acts as the
Watchdog Timer. To change the contents of the PCA0CPM2 register or the function of module 2, the
Watchdog Timer must be disabled.