Features
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Clock Controller
– 80C51 core with 6 clocks per instruction
– 8 MHz On-Chip Oscillator
– PLL for generating clock to supply CPU core, USB and Smart Card Interfaces
– Programmable CPU clock from 500 KHz / X1 to 48 MHz / X1
Reset Controller
– Power On Reset (POR) feature avoiding an external reset capacitor
– Power Fail Detector (PFD)
– Watch-Dog Timer
Power Management
– Two power saving modes : Idle and Power Down
– Four Power Down Wake-up Sources : Smart Card Detection, Keyboard Interrupt, USB
Resume, External Interrupt
– Input Voltage Range : 3.0V - 5.5V
– Core’s Power Consumption (Without Smart Card and USB) :
•30 mA Maximum Operating Current @ 48 MHz / X1
•200
μA
Maximum Power-down Current @ 5.5V
Interrupt Controller
– up to 9 interrupt sources
– up to 4 Level Priority
Memory Controller
– Internal Program memory :
•up to 32KB of Flash or CRAM or ROM for AT8xC5122
•up to 30KB of ROM for AT83C5123
– Internal Data Memory : 768 bytes including 256 bytes of data and 512 bytes of XRAM
– Optional : internal data E2PROM 512 bytes
Two 16-bit Timer/Counters
USB 2.0 Full Speed Interface
– 48 MHz DPLL
– On-Chip 3.3V USB voltage regulator and transceivers
– Software detach feature
– 7 endpoints programmable with In or out directions and ISO, Bulk or Interrupt Transfers :
•Endpoint 0: 32 Bytes Bidirectionnal FIFO for Control transfers
•Endpoints 1,2,3: 8 bytes FIFO
•Endpoints 4,5: 64 Bytes FIFO
•Endpoint 6: 2*64 bytes FIFO with Pin-Pong feature
ISO 7816 UART Interface Fully Compliant with EMV, GIE-CB and WHQL Standards
– Programmable ISO clock from 1 MHz to 4.8 MHz
– Card insertion/removal detection with automatic deactivation sequence
– Programmable Baud Rate Generator from 372 to 11.625 clock pulses
– Synchronous/Asynchronous Protocols T=0 and T=1 with Direct or Inverse Convention
– Automatic character repetition on parity errors
– 32 Bit Waiting Time Counter
– 16 Bit Guard Time Counter
– Internal Step Up/Down Converter with Programmable Voltage Output:
•VCC = 4.0V to 5.5V, 1.8V-30 mA, 3V-60 mA and 5V-60 mA
•VCC = 3.0V, 1.8V-30 mA, 3V-30 mA and 5V-30 mA
– Current overload protection
– 6 kV ESD (MIL/STD 833 Class 3) protection on whole Smart Card Interface
Alternate Smart Card Interface with CLK, IO and RST
UART Interface with Integrated Baud Rate Generator (BRG)
Keyboard interface with up to 20x8 matrix management capability
Master/Slave SPI Interface
Four 8 bit Ports, one 6 bit port, one 3-bit port
– Up to Seven LED outputs with 3 level programmable current source : 2, 4 and 10 mA
– Two General Purpose I/O programmable as external interrupts
– Up to 8 input lines programmable as interrupts
– Up to 30 output lines
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C51
Microcontroller
with USB and
Smart Card
Reader
Interfaces
AT83C5122
AT83EC5122
AT85C5122
AT89C5122
AT89C5122DS
AT83C5123
AT83EC5123
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Rev. 4202E–SCR–06/06
1
AT8xC5122/23
Product Description
AT8xC5122/23 products are high-performance CMOS derivatives of the 80C51 8-bit
microcontrollers designed for USB smart card reader applications.
The AT8xC5122 is proposed in four versions :
- ROM version with or without internal data E2PROM. The ROM device is only factory
programmable.
- CRAM version without internal data E2PROM. The CRAM device implements a vola-
tile program memory which is programmed by means of an embedded ROMed
bootloader which transfers the code from a remote software programming tool called
FLIP through UART or USB interfaces.
- Flash version without internal data E2PROM. At power-up, the program located in the
flash memory is transferred into the CRAM then executed.
The AT83C5123 is a low pin count of the AT8xC5122 and is proposed in ROM version
with or without internal data E2PROM. The ROM device is only factory programmable.
The AT8xC5122DS is a secure version of the AT8xC5122 on which the external pro-
gram memory access mode is disabled.
3
4202E–SCR–06/06
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