参数资料
型号: R5F2L3ACCDFA
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP100
封装: 14 X 20 MM, 0.65 MM PITCH, PLASTIC, QFP-100
文件页数: 62/74页
文件大小: 959K
代理商: R5F2L3ACCDFA
66
2588F–AVR–06/2013
ATtiny261/461/861
10.2.2
Alternate Functions of Port B
The Port B pins with alternate function are shown in Table 10-6.
Port B, Bit 7 – RESET/ dW/ ADC10/ PCINT15
RESET, Reset pin: When the RSTDISBL Fuse is programmed, this pin functions as a normal
I/O pin, and the part will have to rely on Power-on Reset and Brown-out Reset as its reset
sources. When the RSTDISBL Fuse is unprogrammed, the reset circuitry is connected to the
pin, and the pin can not be used as an I/O pin.
If PB7 is used as a reset pin, DDB7, PORTB7 and PINB7 will all read 0.
dW: When the debugWIRE Enable (DWEN) Fuse is programmed and Lock bits are
unprogrammed, the RESET port pin is configured as a wire-AND (open-drain) bi-directional
I/O pin with pull-up enabled and becomes the communication gateway between target and
emulator.
Table 10-6.
Port B Pins Alternate Functions
Port Pin
Alternate Function
PB7
RESET: Reset pin
dW:
debugWire I/O
ADC10: ADC Input Channel 10
PCINT15:Pin Change Interrupt 0, Source 15
PB6
ADC9:
ADC Input Channel 9
T0:
Timer/Counter0 Clock Source
INT0:
External Interrupt 0 Input
PCINT14:Pin Change Interrupt 0, Source 14
PB5
XTAL2: Crystal Oscillator Output
CLKO:
System Clock Output
OC1D:
Timer/Counter1 Compare Match D Output
ADC8:
ADC Input Channel 8
PCINT13:Pin Change Interrupt 0, Source 13
PB4
XTAL1: Crystal Oscillator Input
CLKI:
External Clock Input
OC1D:
Inverted Timer/Counter1 Compare Match D Output
ADC7:
ADC Input Channel 7
PCINT12:Pin Change Interrupt 0, Source 12
PB3
OC1B:
Timer/Counter1 Compare Match B Output
PCINT11:Pin Change Interrupt 0, Source 11
PB2
USCK:
USI Clock (Three Wire Mode)
SCL :
USI Clock (Two Wire Mode)
OC1B:
Inverted Timer/Counter1 Compare Match B Output
PCINT10:Pin Change Interrupt 0, Source 10
PB1
DO:
USI Data Output (Three Wire Mode)
OC1A:
Timer/Counter1 Compare Match A Output
PCINT9: Pin Change Interrupt 1, Source 9
PB0
DI:
USI Data Input (Three Wire Mode)
SDA:
USI Data Input (Two Wire Mode)
OC1A:
Inverted Timer/Counter1 Compare Match A Output
PCINT8: Pin Change Interrupt 1, Source 8
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