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AT89S2051 Datasheet(PDF) 2 Page - ATMEL Corporation

Part # AT89S2051
Description  8-bit Microcontroller with 2K/4K Bytes Flash
PDF  45 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89S2051 Datasheet(HTML) 2 Page - ATMEL Corporation

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2
3390C–MICRO–7/05
AT89S2051/S4051
The on-board Flash program memory is accessible through the ISP serial interface. Holding
RST active forces the device into a serial programming interface and allows the program mem-
ory to be written to or read from, unless one or more lock bits have been activated.
2.
Pin Configuration
2.1
20-lead PDIP/SOIC
3.
Block Diagram
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
RST/VPP
(RXD) P3.0
(TXD) P3.1
XTAL2
XTAL1
(INT0) P3.2
(INT1) P3.3
(T0) P3.4
(T1) P3.5
GND
VCC
P1.7 (SCK)
P1.6 (MISO)
P1.5 (MOSI)
P1.4
P1.3
P1.2
P1.1 (AIN1)
P1.0 (AIN0)
P3.7



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