T89C51RD2-3CSCM Просмотр технического описания (PDF) - Atmel Corporation
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T89C51RD2-3CSCM Datasheet PDF : 104 Pages
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Block Diagram
T89C51RD2
XTAL1
XTAL2
ALE/ PROG
PSEN
EA
RD (3)
WR (3)
(3) (3)
(1) (1) (1) (1)
EUART
RAM
256x8
Flash
64Kx8
CPU
C51
CORE
IB-bus
XRAM EEPROM
1Kx8
2Kx8
PCA
Timer2
Timer 0 INT
Timer 1 Ctrl
(3) (3) (3) (3)
Parallel I/O Ports & Ext. Bus
Port
0
Port
1
Port
2
Port
3
Port
(2)
4
Port
(2)
5
Watch
Dog
Notes: 1. Alternate function of Port 1.
2. Only available on high pin count packages.
3. Alternate function of Port 3.
3
4243G–8051–05/03
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