AT43USB326-AC Atmel, AT43USB326-AC Datasheet - Page 14

• Manufacturer Part Number: AT43USB326-AC
• Description: IC USB KEYBOARD CTRLR HUB 48LQFP
• Manufacturer: Atmel
• Series: AVR®r

Specifications of AT43USB326-AC

• Applications: Keyboard Controller
• Core Processor: AVR
• Program Memory Type: Mask ROM (16 kB)
• Controller Series: AT43USB
• Ram Size: 512 x 8
• Interface: USB
• Number Of I /o: 32
• Voltage - Supply: 4.4 V ~ 5.25 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

I/O Memory
14
AT43USB326
The I/O space definition of the AT43USB326 is shown in the following table:
Table 5. I/O Memory Space
All AT43USB326 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
address range $00 – $1F are directly bit-accessible using the SBI and CBI instructions. In
these registers, the value of single bits can be checked by using the SBIS and SBIC instruc-
tions. Refer to the instruction set documentations of the AVR for more details. When using the
I/O specific commands, IN and OUT, the I/O address $00 – $3F must be used. When address-
ing I/O registers as SRAM, $20 must be added to this address. All I/O register addresses
throughout this document are shown with the SRAM address in parentheses.
For compatibility with future devices, reserved bits should be written to zero if accessed.
Reserved I/O memory addresses should never be written.
I/O (SRAM)
$3D ($5D)
$3E ($5E)
$3B ($5B)
$3A ($5A)
$1B ($4B)
$1A ($3A)
$3F ($5F)
$39 ($59)
$38 ($58)
$35 ($55)
$33 ($53)
$32 ($52)
$21 ($41)
$19 ($39)
$18 ($38)
$17 ($37)
$16 ($36)
$12 ($32)
$11 ($31)
$10 ($30)
$03 ($23)
$02 ($22)
$01 ($21)
Address
MCUCR
WDTCR
PORTB
PORTD
PORTE
GIMSK
TCCR0
PORTA
TCNT0
TIMSK
SREG
DDRA
DDRD
Name
DDRB
DDRE
GIFR
PINA
PINB
PIND
PINE
TIFR
SPH
SPL
Function
Status Register
Stack Pointer High
Stack Pointer Low
General Interrupt Mask Register
General Interrupt Flag Register
Timer/Counter Interrupt Mask Register
MCU General Control Register
Timer/Counter0 (8 bit)
Data Register, Port A
Input Pins, Port A
Data Register, Port B
Input Pins, Port B
Data Register, Port D
Input Pins, Port D
Data Register, Port E
Input Pins, Port E
Timer/Counter Interrupt Mask Register
Timer/Counter0 Control Register
Watchdog Timer Counter Register
Data Direction Register, Port A
Data Direction Register, Port B
Data Direction Register, Port D
Data Direction Register, Port E
3313D–USB–04/06