89C51RB2 Datasheet, PDF (26/52 Pages) NXP Semiconductors – 80C51 8-bit Flash microcontroller family 16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAM

Philips Semiconductors
80C51 8-bit Flash microcontroller family
16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAM
Preliminary specification
89C51RB2/89C51RC2/
89C51RD2
CEXn
CCON
CF
CR
––
CCF4 CCF3
CCF2
CCF1
CCF0 _(0C0H)
(TO CCFn)
CAPTURE
PCA INTERRUPT
PCA TIMER/COUNTER
CH
CL
CCAPnH
CCAPnL
––
ECOMn CAPPn CAPNn MATn
TOGn
PWMn
ECCFn
CCAPMn, n= 0 to 4
(C2H – C6H)
0
0
0
0
Figure 21. PCA Capture Mode
SU01101
WRITE TO
CCAPnH RESET
WRITE TO
CCAPnL
0
1
ENABLE
CF
CR
CCON
––
CCF4
CCF3
CCF2
CCF1
CCF0
(C0H)
CCAPnH
CCAPnL
(TO CCFn)
PCA INTERRUPT
16–BIT COMPARATOR
MATCH
CH
CL
PCA TIMER/COUNTER
––
ECOMn CAPPn CAPNn MATn
TOGn
PWMn
ECCFn
CCAPMn, n= 0 to 4
(C2H – C6H)
0
0
0
0
SU01102
Figure 22. PCA Compare Mode
1999 Sep 23
26