Rainbow Electronics ATtiny861_V User Manual
Page 66
66
2588B–AVR–11/06
ATtiny261/461/861
PCINT3: Pin Change Interrupt source 3.
• Port A, Bit 2 - ADC2/INT1/USCK/SCL/PCINT2
ADC2: Analog to Digital Converter, Channel 2.
INT1: The PA2 pin can serve as an External Interrupt source 1.
USCK: Three-wire mode Universal Serial Interface Clock.
SCL: Two-wire mode Serial Clock for USI Two-wire mode.
PCINT2: Pin Change Interrupt source 2.
• Port A, Bit 1 - ADC1/DO/PCINT1
ADC1: Analog to Digital Converter, Channel 1.
DO: Three-wire mode Universal Serial Interface Data output. Three-wire mode Data output over-
rides PORTA1 value and it is driven to the port when data direction bit DDA1 is set. PORTA1 still
enables the pull-up, if the direction is input and PORTA1 is set.
PCINT1: Pin Change Interrupt source 1.
• Port A, Bit 0 - ADC0/DI/SDA/PCINT0
ADC0: Analog to Digital Converter, Channel 0.
DI: Data Input in USI Three-wire mode. USI Three-wire mode does not override normal port
functions, so pin must be configure as an input for DI function.
SDA: Two-wire mode Serial Interface Data.
PCINT0: Pin Change Interrupt source 0.
Table 12-7
and
Table 12-8
relate the alternate functions of Port A to the overriding signals
shown in
Figure 12-5 on page 59
.
Table 12-7.
Overriding Signals for Alternate Functions in PA7..PA4
Signal
Name
PA7/ADC6/AIN0/
PCINT7
PA6/ADC5/AIN1/
PCINT6
PA5/ADC4/AIN2/
PCINT5
PA4/ADC3/ICP0/
PCINT4
PUOE
0
0
0
0
PUOV
0
0
0
0
DDOE
0
0
0
0
DDOV
0
0
0
0
PVOE
0
0
0
0
PVOV
0
0
0
0
PTOE
0
0
0
0
DIEOE
PCINT7 • PCIE +
ADC6D
PCINT6 • PCIE +
ADC5D
PCINT5 • PCIE +
ADC4D
PCINT4 • PCIE +
ADC3D
DIEOV
ADC6D
ADC5D
ADC4D
ADC3D
DI
PCINT7
PCINT6
PCINT5
ICP0/PCINT4
AIO
ADC6, AIN0
ADC5, AIN1
ADC4, AIN2
ADC3