DOC4106 datasheet(4/47 Pages) ATMEL

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AT8xC51SND1C

4106F–8051–10/02

Figure 2. AT8xC51SND1C 84-pin PLCC Package

(1)

Note:

1. Only samples for development board.

Pin Descriptions

All AT8xC51SND1C signals are detailed by functionality in Table 1 through Table 14.

AT89C51SND1C-SR (Flash)

P2.3/A11

P2.4/A12

P2.6/A14

P2.5/A13

P2.7/A15

MCLK

MDAT

MCMD

PAVSS

VSS

RST

SCLK

DSEL

DCLK

DOUT

P1.0/KIN0

P1.1/KIN1

P1.2/KIN2

P1.3/KIN3

P1.4

P1.5

P1.7/SDA

FILT

VDD

P1.6/SCL

TST

P2.2/A10

ALE

ISP

VDD

UVSS

P4.4

P4.5

VDD

VSS

Table 1. Ports Signal Description

Signal

Name

Type

Description

Alternate

Function

P0.7:0

I/O

Port 0

P0 is an 8-bit open-drain bi-directional I/O port. Port 0 pins that have 1s

written to them float and can be used as high impedance inputs. To

avoid any parasitic current consumption, floating P0 inputs must be

polarized to

VDD or VSS.

AD7:0

P1.7:0

I/O

Port 1

P1 is an 8-bit bi-directional I/O port with internal pull-ups.

KIN3:0

SCL

SDA

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