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| 型號： | Tiny12 |
| 廠商： | Atmel Corp. |
| 英文描述： | 8-bit AVR Microcontroller with 1K Byte Flash |
| 中文描述： | 8位AVR微控制器，帶有1K字節(jié)閃存 |
| 文件頁數(shù)： | 14/91頁 |
| 文件大?。?/td> | 1137K |
| 代理商： | TINY12 |
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14
ATtiny11/12
1006D–AVR–07/03
I/O Memory
The I/O space definition of the ATtiny11/12 is shown in the following table:
Note:
Reserved and unused locations are not shown in the table.
All the different ATtiny11/12 I/O and peripherals are placed in the I/O space. The differ-
ent 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
instructions. Refer to the Instruction Set Summary for more details.
For compatibility with future devices, reserved bits should be written to zero if accessed.
Reserved I/O memory addressed should never be written.
The different I/O and peripherals control registers are explained in the following
sections.
Status Register – SREG
The AVR status register (SREG) at I/O space location $3F is defined as:
Bit 7 - I: Global Interrupt Enable
The global interrupt enable bit must be set (one) for the interrupts to be enabled. The
individual interrupt enable control is then performed in separate control registers. If the
Table 4.
ATtiny11/12 I/O Space
Address Hex
Name
Device
Function
$3F
SREG
ATtiny11/12
Status Register
$3B
GIMSK
ATtiny11/12
General Interrupt Mask Register
$3A
GIFR
ATtiny11/12
General Interrupt Flag Register
$39
TIMSK
ATtiny11/12
Timer/Counter Interrupt Mask Register
$38
TIFR
ATtiny11/12
Timer/Counter Interrupt Flag Register
$35
MCUCR
ATtiny11/12
MCU Control Register
$34
MCUSR
ATtiny11/12
MCU Status Register
$33
TCCR0
ATtiny11/12
Timer/Counter0 Control Register
$32
TCNT0
ATtiny11/12
Timer/Counter0 (8-bit)
$31
OSCCAL
ATtiny12
Oscillator Calibration Register
$21
WDTCR
ATtiny11/12
Watchdog Timer Control Register
$1E
EEAR
ATtiny12
EEPROM Address Register
$1D
EEDR
ATtiny12
EEPROM Data Register
$1C
EECR
ATtiny12
EEPROM Control Register
$18
PORTB
ATtiny11/12
Data Register, Port B
$17
DDRB
ATtiny11/12
Data Direction Register, Port B
$16
PINB
ATtiny11/12
Input Pins, Port B
$08
ACSR
ATtiny11/12
Analog Comparator Control and Status Register
Bit
7
6
5
4
3
2
1
0
$3F
I
T
H
S
V
N
Z
C
SREG
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
0
0
0
0
0
0
0
0
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