Proconx XNUT-100, Руководство по оборудованию

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6.7 Serial Ports
6.7 Serial Ports
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Signal Function
PB0 OUT RX0SWITCH SER0 mode switch, 1 = RS232 mode
PB1 OUT TX0EN SER0 RS-485 transmitter enable, 0 = disabled
PB2 OUT RX1SWITCH SER1 mode switch, 1 = RS232 mode
PB3 OUT TX1EN SER1 RS-485 transmitter enable, 0 = disabled
PB4 OUT RTS0 SER0 request to send
PB6 INP CD0 SER0 carrier detect
PB7 INP RI0 SER0 ring indicator
PD2 INP RXD1 SER1 receive data
PD3 IO TXD1/SQW
SER1 transmit data
Note: This pin has an alternate function and can serve as an SQW
interrupt from the RTC.
PD4 OUT RS232EN RS-232 driver enable, 0 = enable
PE0 INP RXD0 SER0 receive data
PE1 OUT TXD0 SER0 transmit data
PE6 INP CTS0 SER0 clear to send
6.7.1 RS-232 Interfaces
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