P89C51RB2HBA NXP Semiconductors, P89C51RB2HBA Datasheet - Page 31
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P89C51RB2HBA
Manufacturer Part Number
P89C51RB2HBA
Description
Manufacturer
NXP Semiconductors
Datasheet
1.P89C51RB2HBA.pdf
(56 pages)
Specifications of P89C51RB2HBA
Cpu Family
89C
Device Core
80C51
Device Core Size
8b
Frequency (max)
33MHz
Interface Type
UART
Program Memory Type
Flash
Program Memory Size
16KB
Total Internal Ram Size
512Byte
# I/os (max)
32
Number Of Timers - General Purpose
3
Operating Supply Voltage (typ)
5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
4.5V
Instruction Set Architecture
CISC
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
44
Package Type
PLCC
Lead Free Status / Rohs Status
Not Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
P89C51RB2HBA
Manufacturer:
PHILIPS
Quantity:
1 235
Company:
Part Number:
P89C51RB2HBA
Manufacturer:
PHILIPS
Quantity:
20
Part Number:
P89C51RB2HBA
Manufacturer:
PHILIPS/飞利浦
Quantity:
20 000
Philips Semiconductors
2002 May 24
80C51 8-bit Flash microcontroller family
16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAM
INIT_WATCHDOG:
;
;********************************************************************
;
; Main program goes here, but CALL WATCHDOG periodically.
;
;********************************************************************
;
WATCHDOG:
MOV CCAPM4, #4CH
MOV CCAP4L, #0FFH
MOV CCAP4H, #0FFH
ORL CMOD, #40H
CLR EA
MOV CCAP4L, #00
MOV CCAP4H, CH
SETB EA
RET
; Module 4 in compare mode
; Write to low byte first
; Before PCA timer counts up to
; FFFF Hex, these compare values
; must be changed
; Set the WDTE bit to enable the
; Hold off interrupts
; Next compare value is within
; 255 counts of the current PCA
; timer value
; watchdog timer without changing
; the other bits in CMOD
Figure 26. PCA Watchdog Timer Initialization Code
28
P89C51RB2/P89C51RC2/
P89C51RD2Hxx
Product data