Rev. 4247ASSCR04/03
1
Features
Smart Card Interface
Compliance with Standards
ISO/IEC 7816-1, 2, 3 and 4
EMV V96
CB
Mondex
, Proton, ZKA, Other: Contact Gemplus
Supported Smart Cards
Number of Smart Cards Supported: 1
Asynchronous Cards: T=0 and T=1
Synchronous/Memory Cards Using a Command Interpreter
EMV or Non EMV Cards
Electrical Interface
Transmission Speed: 9.6 Kbps to 115 Kbps
Card Power Supply: 1.8V/3V/5V
ESD Protection On Card Pins: 4 KV - Human Body Model
Card Presence or Insertion Detection
Short Circuit Current Limitation
Host Interface
Physical Layer
Serial Asynchronous Link
Programmable Transmission Speed From 1,200 bps to 115,200 bps
Format: 8 bits, No Parity, 1 Stop Bit
Adjustable Signal Voltage
Protocol
Gemplus Block Protocol (GBP)
GBP Interface Library Kit Source Code
Chip Power Supply
Voltage: V
CC
- 2.85V to 5.4V
Consumption: 8 mA Typical, 150 mA Max - Smart Card Powered
Power Down Mode
100 A Max Power Down Current
Power-down/Power-up by Host Command
Additional Features
Operating Temperature Range: 0C to +70C (-40C to +85C)
Package: SS0P24
LED Management: The LED is On When the Card is Powered On
Description
AT83C21GC is designed to simplify the integration of smart card interfaces in elec-
tronic devices.
It manages the electrical interface and communication with ISO 7816 1/2/3/4 com-
patible smart cards and memory cards.
Figure 1. Basic Architecture of a Smart Card Reader
Host
Processor
AT83C21GC
Smart Card
Connector
Smart Card
GemCore Serial
Lite PRO
AT83C21GC
Summary
This is a summary Document. A complete document is
available on the Gemplus Web site. www.gemplus.com
2
AT83C21GC
4247ASSCR04/03
The connection with the host processor is achieved via a serial asynchronous link; the
rate can be selected from a range from 1200 to 115,200 bps.
The software inside the GemCore chip handles a communication protocol with the host
system called the Gemplus Block Protocol (GBP).
A complete set of documentation is available on the Gemplus web site:
http://www.gemplus.com.
A GBP Interface Library Kit can be provided, upon request. It consists of the source
code of the GBP communication layer between the host and GemCore. It is written in
the C language. See the Gemplus developers' site at www.gemplus.com. Enquiries can
also be posted to cardreader@atmel.com.
3
AT83C21GC
4247ASSCR04/03
Pin Description
Figure 2. 24-pin SSOP Pinout
P1.1/CC8
P1.4/CCLK
P1.0/CIO
RST
P1.5/CRST
1
P1.3/CC4
P1.2/CPRES
XTAL1
P3.3/INT1/OE
P3.2/INT0
P3.4/T0
P3.5/CIO1/T1
LI
C
V
CC
CVSS
V
CC
E
V
CC
VSS
P3.0/RxD
P3.1/TxD
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
P3.6/CCLK1/LED0
XTAL2
P3.7/CRST1/LED1
D
V
CC
SSOP24
Table 1. Port Signal Description
Port
Signal
Name
Internal
Power
Supply
ESD
Type
Description
P1.0
CIO
CV
CC
4 kV
I/O
Smart Card Interface Function
Card I/O Pull-up medium is lower than 20K
P1.1
CC8
CV
CC
4 kV
I/O
Smart Card Interface Function
Card contact 8 Pull-up medium must be less than 20K
P1.2
CPRES
V
CC
4 kV
I
Smart Card Interface Function
Card presence
P1.3
CC4
CV
CC
4 kV
I/O
Smart Card Interface Function
Card contact 4 Pull-up medium must be less than 20K
P1.4
CCLK
CV
CC
4 kV
O
Smart Card Interface Function
Card clock
P1.5
CRST
CV
CC
4 kV
O
Smart Card Interface Function
Card reset Pull-up medium must be less than 20K
P3.0
RxD
EV
CC
I
UART Function
Receive data input
P3.1
TxD
EV
CC
O
UART Function
Transmit data output.
P3.2
INT0
DV
CC
I/O
Input/Output Function
P3.2 is a bi-directional I/O port with internal pull-ups.
P3.3
INT1
EV
CC
I/O
Input/Output Function
P3.3 is a bi-directional I/O port with internal pull-ups.
P3.4
EV
CC
I/O
Input/Output Function
P3.4 is a bi-directional I/O port with internal pull-ups.
P3.5
CIO1
DV
CC
I/O
Alternate Card Function
Card I/O: Pull-up medium must be less than 20K
4
AT83C21GC
4247ASSCR04/03
P3.6
CCLK1
DV
CC
O
LED function
These pins can be directly connected to the cathode of the standard LED without
external current limiting resistors. The typical current of each output can be
programmed by software to 2, 4 or 10 mA (LEDCON register).
P3.7
CRST1
DV
CC
I/O
Input/Output Function
P3.7 is a bi-directional I/O port with internal pull-ups.
RST
V
CC
I/O
Reset Input
Holding this pin low for 64 oscillator periods while the oscillatoris running resets the
device. The Port pins are driven to their reset conditions when a voltage lower than V
IL
is applied, whether or not the oscillator is running. This pin has an internal pull-up
resistor which allows the device to be reset by connecting a capacitor between this pin
and VSS. Asserting RST when the chip is in Idle mode or Power-down mode returns
the chip to normal operation. The output is active for at least 12 oscillator periods when
an internal reset occurs.
XTAL1
V
CC
I
Input to the on-chip Inverting Oscillator Amplifier
To use the internal oscillator, a crystal/resonator circuit is connected
to this pin. If an external oscillator is used, its output is connected to this pin.
XTAL2
V
CC
O
Output of the on-chip Inverting Oscillator Amplifier
To use the internal oscillator, a crystal/resonator circuit is connected
to this pin. If an external oscillator is used, XTAL2 may be left unconnected.
V
CC
PWR
Supply Voltage
V
CC
is used to power the internal voltage regulators and internal I/O's.
LI
PWR
DC/DC Input
LI must be tied to V
CC
through an external coil (typically 4, 7
H) and provide the
current for the pump charge of the DC/DC converter.
CV
CC
PWR
Card Supply Voltage
CV
CC
is the programmable voltage output for the Card interface. It must be connected
to an external decoupling capacitor.
DV
CC
PWR
Digital Supply Voltage
DV
CC
is used to supply the digital core and internal I/Os. It is internally connected to the
output of a 3V regulator and must be connected to an external decoupling capacitor.
EV
CC
V
CC
PWR
Extra Supply Voltage
EV
CC
is used to supply the level shifters of UART interface I/O pins. It must be
connected to an external decoupling capacitor. This reference voltage is generated
internally (automatically or not), or it can be connected to an external voltage
reference.
CVSS
GND
DC/DC Ground
CVSS is used to sink high shunt currents from the external coil.
VSS
GND
Ground
Table 1. Port Signal Description (Continued)
Port
Signal
Name
Internal
Power
Supply
ESD
Type
Description
Printed on recycled paper.
Atmel Corporation 2003. All rights reserved. Atmel, the Atmel logo, and combinations thereof are regis-
tered trademarks of Atmel Corporation or its subsidiaries. Gemplus is a registered trademark of Gemplus.
Mondex is a registered trademark of Mondex International Limited.
Other terms and product names in this document may be the trademarks of others.
Disclaimer: Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company's standard
warranty which is detailed in Atmel's Terms and Conditions located on the Company's web site. The Company assumes no responsibility for any
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does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are
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as critical components in life support devices or systems.
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