AT89C5122D-RDRUM Atmel, AT89C5122D-RDRUM Datasheet - Page 53

• Manufacturer Part Number: AT89C5122D-RDRUM
• Description: IC 8051 MCU 32K CRAM USB 64-VQFP
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C5122D-RDRUM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: SmartCard, SPI, UART/USART, USB
• Peripherals: LED, POR, WDT
• Number Of I /o: 46
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP, 64-VQFP
• For Use With: AT89OCD-01 - USB EMULATOR FOR AT8XC51 MCUAT89STK-10 - KIT EVAL APPL MASS STORAGEAT89STK-03 - KIT STARTER FOR MCU AT8XC5122/23
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Other names: AT89C5122D-RDRUMTR

Port 3
4202F–SCR–07/2008
Port
P3.0
P3.1
P3.2
P3.3
P3.4
P3.5
P3.6
P3.7
Alternate Functions
Signal
RxD
TxD
INT0
INT1
T0
T1
WR
RD
Description
Receiver data input (asynchronous) or data input/output
(synchronous) of the serial interface
Transmitter data output (asynchronous) or clock output
(synchronous) of the serial interface
External interrupt 0 input/timer 0 gate control input
External interrupt 1input/timer 1 gate control input
Timer 0 counter input
Timer 1 counter input
External Data Memory write strobe; latches the data byte
from port 0 into the external data memory
External Data Memory read strobe; Enables the external
data memory. Port 3 can drive CMOS inputs without external
pull-ups
Port 3 has the following functions:
Port 3 has the following configurations:
Table 32. Port 3 Description
–
–
–
–
Default function: Port 3 is an 8-bit I/O port.
Alternate functions: see table below
Default configuration: Pseudo bi-directional “Port51” digital input/output with
internal pull-ups.
Alternate configurations: See Table 32.
Configurations
AT83R5122, AT8xC5122/23
Push-pull
Push-pull
Push-pull
Push-pull
Mode 1
KB_OUT
KB_OUT
KB_OUT
KB_OUT
Mode 2
Input WPU
Input WPU
Input WPU
Input WPU
Mode 3
Mode 4
LED1
LED2
LED3
LED0
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