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AT90S2313

0839G–08/01

I/O Memory The I/O space definition of the AT90S2313 is shown in Table 1.

Note: Reserved and unused locations are not shown in the table.

All AT90S2313 I/O and peripherals are placed in the I/O space. The I/O locations are

accessed by the IN and OUT instructions transferring data between the 32 general-pur-

Table 1. AT90S2313 I/O Space

Address Hex Name Function

$3F ($5F) SREG Status Register

$3D ($5D) SPL Stack Pointer Low

$3B ($5B) GIMSK General Interrupt MaSK register

$3A ($5A) GIFR General Interrupt Flag Register

$39 ($59) TIMSK Timer/Counter Interrupt MaSK register

$38 ($58) TIFR Timer/Counter Interrupt Flag register

$35 ($55) MCUCR MCU general Control Register

$33 ($53) TCCR0 Timer/Counter 0 Control Register

$32 ($52) TCNT0 Timer/Counter 0 (8-bit)

$2F ($4F) TCCR1A Timer/Counter 1 Control Register A

$2E ($4E) TCCR1B Timer/Counter 1 Control Register B

$2D ($4D) TCNT1H Timer/Counter 1 High Byte

$2C ($4C) TCNT1L Timer/Counter 1 Low Byte

$2B ($4B) OCR1AH Output Compare Register 1 High Byte

$2A ($4A) OCR1AL Output Compare Register 1 Low Byte

$25 ($45) ICR1H T/C 1 Input Capture Register High Byte

$24 ($44) ICR1L T/C 1 Input Capture Register Low Byte

$21 ($41) WDTCR Watchdog Timer Control Register

$1E ($3E) EEAR EEPROM Address Register

$1D ($3D) EEDR EEPROM Data Register

$1C ($3C) EECR EEPROM Control Register

$18 ($38) PORTB Data Register, Port B

$17 ($37) DDRB Data Direction Register, Port B

$16 ($36) PINB Input Pins, Port B

$12 ($32) PORTD Data Register, Port D

$11 ($31) DDRD Data Direction Register, Port D

$10 ($30) PIND Input Pins, Port D

$0C ($2C) UDR UART I/O Data Register

$0B ($2B) USR UART Status Register

$0A ($2A) UCR UART Control Register

$09 ($29) UBRR UART Baud Rate Register

$08 ($28) ACSR Analog Comparator Control and Status Register

Atmel AVR AT90S2313 User Manual

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