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SCC2681T Datasheet(PDF) 5 Page - NXP Semiconductors |
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SCC2681T Datasheet(HTML) 5 Page - NXP Semiconductors |
5 / 15 page ![]() Philips Semiconductors Product data SCC2681T Dual asynchronous receiver/transmitter (DUART) 2004 Apr 06 5 MNEMONIC NAME AND FUNCTION TYPE PIN TxDA 33 O Channel A Transmitter Serial Data Output: The least significant bit is transmitted first. This output is held in the ‘mark’ condition when the transmitter is disabled, idle, or when operating in local loopback mode. ‘Mark’ is HIGH, ‘space’ is LOW. TxDB 13 O Channel B Transmitter Serial Data Output: The least significant bit is transmitted first. This output is held in the ‘mark’ condition when the transmitter is disabled, idle, or when operating in local loopback mode. ‘Mark’ is HIGH, ‘space’ is LOW. OP0 32 O Output 0: General purpose output, or channel A request to send (RTSAN, active-LOW). Can be deactivated automatically on receive or transmit. OP1 14 O Output 1: General purpose output, or channel B request to send (RTSBN, active-LOW). Can be deactivated automatically on receive or transmit. OP2 31 O Output 2: General purpose output, or channel A transmitter 1 × or 16× clock output, or channel A receiver 1 × clock output. OP3 15 O Output 3: General purpose output, or open-drain, active-LOW counter/timer interrupt output, or channel B transmitter 1 × clock output, or channel B receiver 1× clock output. OP4 30 O Output 4: General purpose output, or channel A open-drain, active-LOW, RxRDYA/FFULLA interrupt output. OP5 16 O Output 5: General purpose output, or channel B open-drain, active-LOW, RxRDYB/FFULLB interrupt output. OP6 29 O Output 6: General purpose output, or channel A open-drain, active-LOW, TxRDYA interrupt output. OP7 17 O Output 7: General purpose output, or channel B open-drain, active-LOW TxRDYB interrupt output. IP0 8 I Input 0: General purpose input, or channel A clear to send active-LOW input (CTSAN). Pin has an internal VCC pull-up device supplying 1 to 4 µA of current. IP1 5 I Input 1: General purpose input, or channel B clear to send active-LOW input (CTSBN). Pin has an internal VCC pull-up device supplying 1 to 4 µA of current. IP2 40 I Input 2: General purpose input, or counter/timer external clock input. Pin has an internal VCC pull-up device supplying 1 to 4 µA of current. IP3 3 I Input 3: General purpose input, or channel A transmitter external clock input (TxCA). When the external clock is used by the transmitter, the transmitted data is clocked on the falling edge of the clock. Pin has an internal VCC pull-up device supplying 1 to 4 µA of current. IP4 43 I Input 4: General purpose input, or channel A receiver external clock input (RxCA). When the external clock is used by the receiver, the received data is sampled on the rising edge of the clock. Pin has an internal VCC pull-up device supplying 1 to 4 µA of current. IP5 42 I Input 5: General purpose input, or channel B transmitter external clock input (TxCB). When the external clock is used by the transmitter, the transmitted data is clocked on the falling edge of the clock. Pin has an internal VCC pull-up device supplying 1 to 4 µA of current. IP6 41 I Input 6: General purpose input, or channel B receiver external clock input (RxCB). When the external clock is used by the receiver, the received data is sampled on the rising edge of the clock. Pin has an internal VCC pull-up device supplying 1 to 4 µA of current. VCC 44 I Power Supply: +5 V supply input. GND 22 I Ground n.c. 1, 12, 23, 34 not connected |
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