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P89C51RD2 - 8 bit Microcontroller with 64k Bytes Flash Memory Technical Data

Photograph
P89C51RD2 - 8 bit Microcontroller with 64k Bytes Flash Memory

Features
  • 80C51 CPU
  • On-chip Flash Program Memory with In-System Programming
  • Boot ROM contains Flash programming routines for downloading via UART
  • 6/12 clocks per machine cycle
  • Speed 20MHz/33MHz with 12 clocks per machine cycle
  • Fully Static Operation
  • RAM expandable externally to 64 kbytes
  • Four Interrupt Priority Levels
  • Seven Interrupt Sources
  • Four 8-bit I/O ports
  • Full-duplex enhanced UART
  • Power Control Modes
  • Programmable Clock Out
  • Asynchronous Port Reset
  • Programmable Counter Array

Pin Layout
P89C51RD2 Pin Layout

Pin Description
Pin Number Description
1 Port 1.0 / Timer 2
2 Port 1.1 / Timer 2
3 Port 1.2 / External Clock Input
4 Port 1.3 / PCA Module 0
5 Port 1.4 / PCA Module 1
6 Port 1.5 / PCA Module 2
7 Port 1.6 / PCA Module 3
8 Port 1.7 / PCA Module 4
9 Reset
10 Port 3.0 / Serial Input Port
11 Port 3.1 / Serial Outpur Port
12 Port 3.2 / External Interrupt
13 Port 3.3 / External Interrupt
14 Port 3.4 / Timer 0 External Input
15 Port 3.5 / Timer 1 External Input
16 Port 3.6 / External Data Memory Write
17 Port 3.7 / External Data Memory Read
18 Crystal 2
19 Crystal 1
20 Ground
21 Port 2.0
22 Port 2.1
23 Port 2.2
24 Port 2.3
25 Port 2.4
26 Port 2.5
27 Port 2.6
28 Port 2.7
29 Program Strobe Enable
30 Address Latch Enable
31 External Access Enable/Programming Supply
32 Port 0.7
33 Port 0.6
34 Port 0.5
35 Port 0.4
36 Port 0.3
37 Port 0.2
38 Port 0.1
39 Port 0.0
40 Vcc - Power Supply

Dimensional Drawing
P89C51RD2 IC Dimensional Drawing

Technical Data

Datasheet

Datasheet for P89C51RD2 Datasheet

Application Notes