AT89C5122 ATMEL [ATMEL Corporation], AT89C5122 Datasheet - Page 5

• Manufacturer Part Number: AT89C5122
• Description: MICROCONTROLLER WITH USB AND SMART CARD READER INTERFACES
• Manufacturer: ATMEL [ATMEL Corporation]

AT8xC5122 Block Diagram
AT83C5123 Block Diagram
4202D–SCR–06/05
XTAL1
XTAL2
XTAL1
XTAL2
PLLF
PLLF
RST
RST
PORT
8-BIT
WATCH-DOG
WATCH-DOG
Oscillator
Oscillator
8 MHz
RESET
8 MHz
RESET
PLL
POR
POR
PFD
PLL
PFD
PORT
3-BIT
Regulator
Regulator
256 x 8
PORT
PORT
8-BIT
3-BIT
256 x 8
3.3 V
RAM
3.3 V
RAM
PORT
PORT
8-BIT
8-BIT
Parallel I/O Ports
ROM (1)
32K x 8
256 x 8
Parallel I/O Ports
256 x 8
30K x 8
RAM
RAM
ROM
PORT
PORT
6-BIT
1-BIT
CRAM (1)
512 x 8
32K x 8
E2PROM (1)
XRAM
512 x 8
XRAM
512 x 8
PORT
8-BIT
LED's
Interf ace
E2PROM (1)
E2PROM (1)
UART
INTERNAL ADDRESS AND DATA BUS
Interf ace
32K x 8
512 x 8
UART
LED's
INTERNAL ADDRESS AND DATA BUS
Note 1 : the implementation of these f eatures depends on product v ersions
TIMERS
16-BIT
Interf ace
Interf ace
TIMERS
16-BIT
KBD
SPI
Controller
Interrupt
Note 1 : the implementation of these f eatures depends on product v ersions
Controller
Interrupt
External Memory
Controller
Alternate
Card
Alternate
Card
Conv erter
Interf ace
DC/DC
Conv erter
USB
Interf ace
DC/DC
USB
Regulator
3.3V
Regulator
3.3V
CPRES
CRST
CCLK
CIO
CC4
CC8
CPRES
CRST
CCLK
CIO
CC4
CC8
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