
Philips Semiconductors
Product specification
8XC52/54/58/80C32
8XC51FA/FB/FC/80C51FA
8XC51RA+/RB+/RC+/RD+/80C51RA+
80C51 8-bit microcontroller family
8K–64K/256–1K OTP/ROM/ROMless, low voltage (2.7V–5.5V),
low power, high speed (33MHz)
1999 Apr 01
30
(8XC51FX and 8XC51RX+ ONLY)
CF
CR
CCF4
CCF3
CCF2
CCF1
CCF0
––
CCON
(D8H)
––
ECOMn
CAPPn
CAPNn
MATn
TOGn
PWMn
ECCFn
CCAPMn, n: 0..4
(DAH – DEH)
CH
CL
CCAPnH
CCAPnL
PCA INTERRUPT
PCA TIMER/COUNTER
1
0
0
0
16–BIT COMPARATOR
(TO CCFn)
WRITE TO
CCAPnH
RESET
WRITE TO
CCAPnL
0
1
ENABLE
CEXn
TOGGLE
MATCH
SU00751
Figure 23. PCA High Speed Output Mode
CL < CCAPnL
––
ECOMn
CAPPn
CAPNn
MATn
TOGn
PWMn
ECCFn
CCAPMn, n: 0..4
(DAH – DEH)
PCA TIMER/COUNTER
0
0
0
0
CL
CCAPnL
CEXn
8–BIT
COMPARATOR
OVERFLOW
CCAPnH
ENABLE
0
1
CL >= CCAPnL
0
SU00752
Figure 24. PCA PWM Mode