AT43USB353M_04 Datasheet, PDF (13/95 Pages) ATMEL Corporation – Low Cost Full-speed USB Microcontroller with Embedded Hub, ADC and PWM

I/O Memory
3307B–USB–4/04
AT43USB353M
The I/O space definition of the AT43USB353M is shown in Table 7:
Table 7. I/O Memory Space
I/O (SRAM)
Address
Name
$3F ($5F)
SREG
$3E ($5E)
SPH
$3D ($5D)
SPL
$3B ($5B)
GIMSK
$3A ($5A)
GIFR
$39 ($59)
TIMSK
$38 ($58)
TIFR
$35 ($55)
MCUCR
$33 ($53)
TCCR0
$32 ($52)
TCNT0
$2F ($4F)
TCCR1A
$2E ($4E)
TTCR1B
$2D ($52)
TCNT1H
$2C ($52)
TCNT1L
$2B ($4B)
OCR1AH
$2A ($4A)
OCR1AL
$29 ($49)
OCR1BH
$28 ($48)
OCR1BL
$25 ($45)
ICR1H
$24 ($44)
ICR1L
$21 ($41)
WDTCR
$1B ($4B)
PORTA
$1A ($3A)
DDRA
$19 ($39)
PINA
$12 ($32)
PORTD
$11 ($31)
DDRD
$10 ($30)
PIND
$08 ($28)
ADCH
$07 ($27)
ADCL
$03 ($23)
ADCH
$02 ($22)
ADCL
Function
Status Register
Stack Pointer High
Stack Pointer Low
General Interrupt Mask Register
General Interrupt Flag Register
Timer/Counter Interrupt Mask Register
Timer/Counter Interrupt Mask Register
MCU General Control Register
Timer/Counter0 Control Register
Timer/Counter0 (8 bit)
Timer/Counter1 Control Register A
Timer/Counter1 Control Register B
Timer/Counter1 High Byte
Timer/Counter1 Low Byte
Timer/Counter1 Output Compare Register A High Byte
Timer/Counter1 Output Compare Register A Low Byte
Timer/Counter1 Output Compare Register B High Byte
Timer/Counter1 Output Compare Register B Low Byte
T/C 1 Input Capture Register High Byte
T/C 1 Input Capture Register Low Byte
Watchdog Timer Counter Register
Data Register, Port A
Data Direction Register, Port A
Input Pins, Port A
Data Register, Port D
Data Direction Register, Port D
Input Pins, Port D
ADC Mux Select Register
ADC Control and Status Register
ADC High Byte Data Register
ADC Low Byte Data Register
All AT43USB353M I/O and peripherals, except for the USB hardware registers, 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-purpose working registers and the I/O space. I/O registers within the
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