P89V51RD2 Philips Semiconductors, P89V51RD2 Datasheet - Page 48

• Manufacturer Part Number: P89V51RD2
• Description: 8-bit 80C51 5 V low power 64 kB Flash microcontroller with 1 kB RAM
• Manufacturer: Philips Semiconductors

Philips Semiconductors
9397 750 12964
Product data
Fig 22. PCA capture mode.
CEXn
CF
-
7.8.2 16-bit software timer mode
ECOMn
CR
0
If the CCFn bit for the module in the CCON SFR and the ECCFn bit in the CCAPMn
SFR are set then an interrupt will be generated.
The PCA modules can be used as software timers
ECOM and MAT bits in the modules CCAPMn register. The PCA timer will be
compared to the module’s capture registers and when a match occurs an interrupt
will occur if the CCFn (CCON SFR) and the ECCFn (CCAPMn SFR) bits for the
module are both set.
CAPPn
-
CAPNn
CCF4
MATn
CCF3
Rev. 01 — 01 March 2004
0
CAPTURE
(to CCFn)
TOGn
CCF2
0
PWMn
CCF1
0
ECCFn
CCF0
8-bit microcontrollers with 80C51 core
CCON
(C0h)
CCAPMn, n = 0 to 4
(C2H to C6H)
CCAPnH CCAPnL
PCA timer/counter
(Figure
CH
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
interrupt
PCA
23) by setting both the
CL
P89V51RD2
002aaa538
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