參數(shù)資料
型號: P89C51UFPN
廠商: NXP SEMICONDUCTORS
元件分類: 微控制器/微處理器
英文描述: DRILL BIT SET, TIN 19 PIECEDRILL BIT SET, TIN 19 PIECE; Material:Titanium
中文描述: 8-BIT, FLASH, 33 MHz, MICROCONTROLLER, PDIP40
封裝: 0.600 INCH, PLASTIC, MO-015AJ, SOT-129-1, DIP-40
文件頁數(shù): 41/68頁
文件大?。?/td> 404K
代理商: P89C51UFPN
Philips Semiconductors
Preliminary data
P89C51RA2/RB2/RC2/RD2xx
80C51 8-bit Flash microcontroller family
8KB/16KB/32KB/64KB ISP/IAP Flash with 512B/512B/512B/1KB RAM
2002 Jul 18
41
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 37. PCA Watchdog Timer Initialization Code
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P89C51X2BN/00,112 功能描述:8位微控制器 -MCU 4K/128 FL 12/6 CLK COMM DIP RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT