p89v51rb2 NXP Semiconductors, p89v51rb2 Datasheet - Page 51

• Manufacturer Part Number: p89v51rb2
• Description: 8-bit 80c51 5 V Low Power 16/32/64 Kb Flash Microcontroller With 1 Kb Ram
• Manufacturer: NXP Semiconductors

NXP Semiconductors
P89V51RB2_RC2_RD2_4
Product data sheet
Fig 23. PCA capture mode
CEXn
6.9.2 16-bit software timer mode
CF
-
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
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.
ECOMn
CR
0
CAPPn
-
CAPNn
CCF4
Rev. 04 — 1 May 2007
MATn
CCF3
(to CCFn)
0
capture
TOGn
CCF2
0
PWMn
CCF1
P89V51RB2/RC2/RD2
0
8-bit microcontrollers with 80C51 core
ECCFn
(Figure
CCF0
CCAPMn, n = 0 to 4
(DAH to DEH)
CCON
(D8H)
24) by setting both the ECOM
CCAPnH CCAPnL
PCA timer/counter
CH
PCA
interrupt
002aaa538
© NXP B.V. 2007. All rights reserved.
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