參數(shù)資料
型號(hào)： AT43USB326-AU
廠商： Atmel Corp.
英文描述： Multimedia USB Keyboard Controller with Embedded Hub
中文描述： 多媒體USB鍵盤控制器的嵌入式集線器
文件頁數(shù)： 14/102頁
文件大?。?/td> 511K
代理商： AT43USB326-AU
14
AT43USB326
3313D–USB–04/06
I/O Memory
The I/O space definition of the AT43USB326 is shown in the following table:
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.
Table 5.
I/O Memory Space
I/O (SRAM)
Address
Name
Function
$3F ($5F)
SREG
Status Register
$3E ($5E)
SPH
Stack Pointer High
$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 Mask Register
$35 ($55)
MCUCR
MCU General Control Register
$33 ($53)
TCCR0
Timer/Counter0 Control Register
$32 ($52)
TCNT0
Timer/Counter0 (8 bit)
$21 ($41)
WDTCR
Watchdog Timer Counter Register
$1B ($4B)
PORTA
Data Register, Port A
$1A ($3A)
DDRA
Data Direction Register, Port A
$19 ($39)
PINA
Input Pins, Port A
$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
$03 ($23)
PORTE
Data Register, Port E
$02 ($22)
DDRE
Data Direction Register, Port E
$01 ($21)
PINE
Input Pins, Port E
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