Rainbow Electronics T89C51CC02 - Manual (Page 112)

112 Rev.A - May 17, 2001
Preliminary
T89C51CC02
CCAPM0 (S:DAh)
CCAPM1 (S:DBh)
PCA Compare/Capture Module n Mode registers (n=0..1)
Reset Value = X000 0000b
Figure 114. CCAPMn Registers
7 6 5 4 3 2 1 0
- ECOMn CAPPn CAPNn MATn TOGn PWMn ECCFn
Bit Number Bit Mnemonic Description
7 -
Reserved
The Value read from this bit is indeterminate. Do not set this bit.
6 ECOMn
Enable Compare Mode Module x bit
Clear to disable the Compare function.
Set to enable the Compare function.
The Compare function is used to implement the software Timer, the high-speed output, the Pulse
Width Modulator (PWM) and the Watchdog Timer (WDT).
5 CAPPn
Capture Mode (Positive) Module x bit
Clear to disable the Capture function triggered by a positive edge on CEXx pin.
Set to enable the Capture function triggered by a positive edge on CEXx pin
4 CAPNn
Capture Mode (Negative) Module x bit
Clear to disable the Capture function triggered by a negative edge on CEXx pin.
Set to enable the Capture function triggered by a negative edge on CEXx pin.
3 MATn
Match Module x bit
Set when a match of the PCA Counter with the Compare/Capture register sets CCFx bit in CCON
register, flagging an interrupt.
Must be cleared by software.
2 TOGn
Toggle Module x bit
The toggle mode is configured by setting ECOMx, MATx and TOGx bits.
Set when a match of the PCA Counter with the Compare/Capture register toggles the CEXx pin.
Must be cleared by software.
1 PWMn
Pulse Width Modulation Module x Mode bit
Set to configure the module x as an 8-bit Pulse Width Modulator with output waveform on CEXx pin.
Must be cleared by software.
0 ECCFn
Enable CCFx Interrupt bit
Clear to disable CCFx bit in CCON register to generate an interrupt request.
Set to enable CCFx bit in CCON register to generate an interrupt request.