Rainbow-electronics ATmega8515L Bedienungsanleitung PDF herunterladen (Seite 70)

ATmega8515(L)

2512A–AVR–04/02

•RXD–PortD,Bit0

RXD, Receive Data (Data input pin forUSART). When the USART Receiver is enabled

thispin isconfigured as an input regardless of thevalue of DDD0. When USART forces

thispin to beaninput, the pull-upcan still be controlledbythePORTD0 bit.

Table 36 and Table 37 relate thealternate functions of Port D to theoverriding signals

showninFigure 32onpage 61.

Table 36. Overriding Signals for Alternate Functions PD7..PD4

Signal Name PD7/RD PD6/WR PD5/OC1A PD4/XCK

PUOE SRESRE 00

PUOV000 0

DDOE SRESRE 00

DDOV110 0

PVOE SRESREOC1A ENABLE XCK OUTPUT ENABLE

PVOVRD

WR OC1A XCK OUTPUT

DIEOE 00 0 0

DIEOV00 0 0

DI –– – XCK INPUT

AIO –– – –

Table 37. Overriding Signals for Alternate Functions in PD3..PD0

Signal Name PD3/INT1 PD2/INT0 PD1/TXDPD0/RXD

PUOE 00 TXEN0RXEN0

PUOV0 0 0 PORTD0•PUD

DDOE 00 TXEN0RXEN0

DDOV0 0 1 0

PVOE 00 TXEN00

PVOV0 0 TXD 0

DIEOE INT1 ENABLE INT0 ENABLE 00

DIEOV1 1 0 0

DI INT1 INPUT INT0 INPUT–RXD

AIO –– ––

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Rainbow-electronics ATmega8515L Bedienungsanleitung Seite 70