Rainbow Electronics ATmega128RFA1 - Manual (Page 197)

197
8266A-MCU Wireless-12/09
ATmega128RFA1
Signal
Name PD7/T0 PD6/T1 PD5/XCK1 PD4/ICP1
DDOV 0 0 1 0
PVOE 0 0 XCK1 OUTPUT
ENABLE 0
PVOV 0 0 XCK1 OUTPUT 0
DIEOE 0 0 0 0
DIEOV 0 0 0 0
DI T0 INPUT T1 INPUT XCK1 INPUT ICP1 INPUT
AIO – – – –
Table 14-8. Overriding Signals for Alternate Functions PD3:PD0
Signal
Name PD3/INT3/TXD1 PD2/INT2/RXD1 PD1/INT1/SDA PD0/INT0/SCL
PUOE TXEN1 RXEN1 TWEN TWEN
PUOV 0 PORTD2&(~PUD) PORTD1&(~PUD) PORTD0&(~PUD)
DDOE TXEN1 RXEN1 TWEN TWEN
DDOV 1 0 SDA_OUT SCL_OUT
PVOE TXEN1 0 TWEN TWEN
PVOV TXD1 0 0 0
DIEOE INT3 ENABLE INT2 ENABLE INT1 ENABLE INT0 ENABLE
DIEOV 1 1 1 1
DI INT3 INPUT INT2 INPUT/RXD1 INT1 INPUT INT0 INPUT
AIO - - SDA INPUT SCL INPUT
Note:
1. When enabled, the 2-wire Serial Interface enables Slew-Rate controls on the
output pins PD0 and PD1. This is not shown in this table. In addition, spike filters
are connected between the AIO outputs shown in the port figure and the digital
logic of the TWI module.
14.3.3 Alternate Functions of Port E
The Port E pins with alternate functions are shown in the following table.
Table 14-9. Port E Pins Alternate Functions
Port
Pin Alternate Function
PE7 INT7/ICP3/CLK0 (External Interrupt7 Input, Timer/Counter3 Input Capture Trigger or
Divided System Clock)
PE6 INT6/T3 (External Interrupt6 Input or Timer/Counter3 Clock Input)
PE5 INT5/OC3C (External Interrupt5 Input or Output Compare and PWM Output C for
Timer/Counter3)
PE4 INT4/OC3B (External Interrupt4 Input or Output Compare and PWM Output B for
Timer/Counter3)
PE3 AIN1/OC3A (Analog Comparator Negative Input or Output Compare and PWM Output A
for Timer/Counter3)
PE2 AIN0/XCK0 (Analog Comparator or Positive Input or USART0 external clock input/output)
PE1 TXD0 (USART0 Transmit Pin)