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| 型號： | IT80C52XXX-16SHXXX |
| 廠商： | TEMIC SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP44 |
| 文件頁數(shù)： | 2/81頁 |
| 文件大小： | 663K |
| 代理商： | IT80C52XXX-16SHXXX |
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10
ATtiny28L/V
1062F–AVR–07/06
Memories
I/O Memory
The I/O space definition of the ATtiny28 is shown in Table 3.
Note:
Reserved and unused locations are not shown in the table.
All ATtiny28 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-
pose 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 instructions. Refer to
the Instruction Set section for more details.
For compatibility with future devices, reserved bits should be written to zero if accessed.
Reserved I/O memory addresses should never be written.
The I/O and peripherals control registers are explained in the following sections.
Table 3. ATtiny28 I/O Space
Address Hex
Name
Function
$3F
SREG
Status Register
$1B
PORTA
Data Register, Port A
$1A
PACR
Port A Control Register
$19
PINA
Input Pins, Port A
$16
PINB
Input Pins, Port B
$12
PORTD
Data Register, Port D
$11
DDRD
Data Direction Register, Port D
$10
PIND
Input Pins, Port D
$08
ACSR
Analog Comparator Control and Status Register
$07
MCUCS
MCU Control and Status Register
$06
ICR
Interrupt Control Register
$05
IFR
Interrupt Flag Register
$04
TCCR0
Timer/Counter0 Control Register
$03
TCNT0
Timer/Counter0 (8-bit)
$02
MODCR
Modulation Control Register
$01
WDTCR
Watchdog Timer Control Register
$00
OSCCAL
Oscillator Calibration Register
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