參數(shù)資料
型號(hào): 8XC58
廠商: NXP Semiconductors N.V.
英文描述: 80C51 8-bit microcontroller family 8XC51FA/FB/FC/80C51FA8XC51RA+/RB+/RC+/RD+/80C51RA +8K 4K/256K OTP/ROM/ROMless,low voltage, low power, high speed (33 MHz)(80C51 8位微控制器系列產(chǎn)品)
中文描述: 80C51的8位單片機(jī)系列8XC51FA/FB/FC/80C51FA8XC51RA /預(yù)算/遙控/路/ 80C51RA 8K的4K/256K檢察官辦公室/光盤/無(wú)ROM,低電壓,低功耗,高速(33兆赫)(80C51的8位微控制器系列產(chǎn)品)
文件頁(yè)數(shù): 32/56頁(yè)
文件大小: 337K
代理商: 8XC58
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
32
(8XC51FX and 8XC51RX+ ONLY)
INIT_WATCHDOG:
MOV CCAPM4, #4CH ; Module 4 in compare mode
MOV CCAP4L, #0FFH ; Write to low byte first
MOV CCAP4H, #0FFH ; Before PCA timer counts up to
; FFFF Hex, these compare values
; must be changed
ORL CMOD, #40H ; Set the WDTE bit to enable the
; watchdog timer without changing
; the other bits in CMOD
;
;********************************************************************
;
; Main program goes here, but CALL WATCHDOG periodically.
;
;********************************************************************
;
WATCHDOG:
CLR EA ; Hold off interrupts
MOV CCAP4L, #00 ; Next compare value is within
MOV CCAP4H, CH ; 255 counts of the current PCA
SETB EA ; timer value
RET
Figure 26. PCA Watchdog Timer Initialization Code
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