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AT85C5121 Datasheet(PDF) 5 Page - ATMEL Corporation

Part # AT85C5121
Description  8-bit Microcontroller with Multiprotocol Smart Card Interface
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT85C5121 Datasheet(HTML) 5 Page - ATMEL Corporation

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5
A/T8xC5121
4164G–SCR–07/06
Signals
All the T8xC5121 signals are detailed in Table 1.
The port structure is described in Section “Port Structure Description”.
Table 1. Ports Description
Port
Signal
Name
Alternate
Internal
Power
Supply
ESD
Type
Description
P1.0
CIO
CVCC
4 kV
I/O
Smart card interface function
Card I/O.
I/O
Input/Output function
P1.0 is a bi-directional I/O port .
I
Reset configuration
Input .
P1.1
CC8
CVCC
4 kV
O
Smart card interface function
Card contact 8
O
Output function
P1.1 is a Push-pull port.
I
Reset configuration
Input
P1.2
CPRES
VCC
4 kV
I
Smart card interface function
Card presence
I/O
Input/Output function
P1.2 is a bi-directional I/O port with internal pull-ups- ( External Pull-up
configuration can be selected).
I
Reset configuration
Input (high level due to internal pull-up)
P1.3
CC4
CVCC
4 kV
O
Smart card interface function
Card contact 4
O
Output function
P1.3 is a Push-pull port.
I
Reset configuration
Input (high level due to internal pull-up)
P1.4
CCLK
CVCC
4 kV
O
Smart card interface function
Card clock
I/O
Input/Output function
P1.4 is a a Push-pull port.
O
Reset configuration
Output at low level
P1.5
CRST
CVCC
4 kV
O
Smart card interface function
Card reset
I/O
Input/Output function
P1.5 is a a Push-pull port.
O
Reset configuration
Output at low level


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