參數(shù)資料
型號(hào): P89V51RB2BBC
廠商: NXP SEMICONDUCTORS
元件分類(lèi): 微控制器/微處理器
英文描述: 8-bit 80C51 5 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM
中文描述: 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP44
封裝: 10 X 10 MM, 1 MM HEIGHT, PLASTIC, MS-026, TQFP-44
文件頁(yè)數(shù): 51/77頁(yè)
文件大小: 350K
代理商: P89V51RB2BBC
Philips Semiconductors
P89V51RB2/RC2/RD2
8-bit microcontrollers with 80C51 core
Product data
Rev. 03 — 02 December 2004
51 of 77
9397 750 14341
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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.
7.8.2
16-bit software timer mode
The PCA modules can be used as software timers (
Figure 24
) by setting both the
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.
Fig 23. PCA capture mode.
002aaa538
CF
CR
-
CCF4
CCF3
CCF2
CCF1
CCF0
CCON
(C0h)
PCA
interrupt
PCA timer/counter
-
ECOMn
0
0
0
0
CAPPn
CAPNn
MATn
TOGn
PWMn
ECCFn
CCAPMn, n = 0 to 4
(DAH to DEH)
CH
CL
CCAPnH CCAPnL
capture
(to CCFn)
CEXn
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