AT90S2313-4PI Atmel, AT90S2313-4PI Datasheet - Page 57

• Manufacturer Part Number: AT90S2313-4PI
• Description: IC MCU 2K 4MHZ UART LV IT 20DIP
• Manufacturer: Atmel
• Series: AVR® 90Sr

Specifications of AT90S2313-4PI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 15
• Program Memory Size: 2KB (1K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -

Port D Schematics
0839I–AVR–06/02
• INT1 – Port D, Bit 3
INT1, External Interrupt Source 1. The PD3 pin can serve as an external interrupt
source to the MCU. See the interrupt description for further details and how to enable
the source.
• INT0 – Port D, Bit 2
INT0, External Interrupt Source 0. The PD2 pin can serve as an external interrupt
source to the MCU. See the interrupt description for further details and how to enable
the source.
• TXD – Port D, Bit 1
Transmit Data (Data Output pin for the UART). When the UART Transmitter is enabled,
this pin is configured as an output regardless of the value of DDRD1.
• RXD – Port D, Bit 0
Receive Data (Data Input pin for the UART). When the UART Receiver is enabled, this
pin is configured as an input regardless of the value of DDRD0. When the UART forces
this pin to be an input, a logical “1” in PORTD0 will turn on the internal pull-up.
Note that all port pins are synchronized. The synchronization latches are, however, not
shown in the figures.
Figure 44. Port D Schematic Diagram (Pin PD0)
PD0
WP:
WD:
RL:
RP:
RD:
RXD:
RXEN:
MOS
PULL-
UP
WRITE PORTD
WRITE DDRD
READ PORTD LATCH
READ PORTD PIN
READ DDRD
UART RECEIVE DATA
UART RECEIVE ENABLE
RL
RP
Q
Q
PORTD0
RESET
RESET
DDD0
WD
WP
RD
C
C
AT90S2313
D
D
RXEN
RXD
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