Attiny2313 – Rainbow Electronics ATtiny2313 User Manual
Page 56
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ATtiny2313
2543A–AVR–08/03
• AIN1/PCINT1 – Port B, Bit 1
AIN1: Analog Comparator Negative input and ADC6: ADC input channel 6
.
Configure
the port pin as input with the internal pull-up switched off to avoid the digital port function
from interfering with the function of the analog comparator or analog to digital converter.
PCINT1: Pin Change Interrupt Source 1. The PB1 pin can serve as an external interrupt
source.
• AIN0/PCINT0 – Port B, Bit 0
AIN0: Analog Comparator Positive input and ADC5: ADC input channel 5
.
Configure the
port pin as input with the internal pull-up switched off to avoid the digital port function
from interfering with the function of the Analog Comparator or analog to digital
converter.
PCINT0: Pin Change Interrupt Source 0. The PB0 pin can serve as an external interrupt
source.
Table 27 and Table 28 relate the alternate functions of Port B to the overriding signals
shown in Figure 25 on page 52. SPI MSTR INPUT and SPI SLAVE OUTPUT constitute
the MISO signal, while MOSI is divided into SPI MSTR OUTPUT and SPI SLAVE
INPUT.
Table 27. Overriding Signals for Alternate Functions in PB7..PB4
Signal
Name
PB7/USCK/
SCL/PCINT7
PB6/DO/PCINT6
PB5/SDA/
DI/PCINT5
PB4/OC1B/
PCINT4
PUOE
0
0
0
0
PUOV
0
0
0
0
DDOE
USI_TWO_WIRE
0
USI_TWO_WIRE
0
DDOV
(USI_SCL_HOLD
+ PORTB7)•DDB7
0
(SDA + PORTB5)•
DDRB5
0
PVOE
USI_TWO_WIRE
• DDRB7
USI_THREE_WIRE
USI_TWO_WIRE
• DDRB5
OC1B_PVOE
PVOV
0
DO
0
0OC1B_PVOV
PTOE
USI_PTOE
0
0
0
DIEOE
(PCINT7•PCIE)
+USISIE
(PCINT6•PCIE)
(PCINT5•PCIE) +
USISIE
(PCINT4•PCIE)
DIEOV
1
1
1
1
DI
PCINT7 INPUT
USCK INPUT SCL
INPUT
PCINT6 INPUT
PCINT5 INPUT
SDA INPUT
DI INPUT
PCINT4 INPUT
AIO
–
–
–
–