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T83C5121XXX-S3RIL Datasheet(PDF) 7 Page - ATMEL Corporation

Part # T83C5121XXX-S3RIL
Description  8-bit Microcontroller with MULTI-PROTOCOL SMART CARD INTERFACE
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

T83C5121XXX-S3RIL Datasheet(HTML) 7 Page - ATMEL Corporation

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7
T8xC5121
4164C–SCR–07/03
RST
V
CC
I/O
Reset input
Holding this pin low for 64 oscillator periods while the oscillator
is 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 µH) and provide
the current for the pump charge of the DC/DC converter.
CVCC
PWR
Card Supply voltage
CVCC is the programmable voltage output for the Card interface.
It must be connected to an external decoupling capacitor.
DVCC
PWR
Digital Supply voltage
DVCC 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
ONLY FOR PLCC52 version
Table 1. Ports Description (Continued)
Port
Signal
Name
Alternate
Internal
Power
Supply
ESD
Type
Description


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