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SC68C94A1N Datasheet(PDF) 3 Page - NXP Semiconductors |
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SC68C94A1N Datasheet(HTML) 3 Page - NXP Semiconductors |
3 / 33 page Philips Semiconductors Product specification SC68C94 Quad universal asynchronous receiver/transmitter (QUART) 1995 May 1 3 BLOCK DIAGRAM 8 D0–D7 RDN WRN CEN A0–A5 RESET X1/CLK X2 6 BUS BUFFER OPERATION CONTROL ADDRESS DECODE R/W CONTROL TIMING CHANNEL A MR 0, 1, 2 CR SR INPUT PORT OUTPUT PORT OPCR CSR Rx CSR Tx CRYSTAL OSCILLATOR POWER UP-DOWN LOGIC SAME AS DUART AB 8 BYTE TRANSMIT FIFO TRANSMIT SHIFT REGISTER 8 BYTE RECEIVE FIFO RECEIVE SHIFT REGISTER CHANGE-OF- STATE DETECTORS (4) IPCR ACR FUNCTION SELECT LOGIC CHANNEL B (AS ABOVE) TIMING CLOCK SELECTORS COUNTER/ TIMER ACR CTUR CTLR INTERRUPT CONTROL IMR ISR INTERNAL DATA BUS TxDA RxDA TxDB RxDB 1:0 4 TIMING CONTROL DACKN DUART CD TXDC TXDD RXDC RXDD I/O[3:0]C I/O[3:0]D 1:0 I/O[3:0]B I/O[3:0]A •VCC •VSS1 •VSS2 •VSS3 •VSS4 BAUD RATE GENERATOR DUART AB LOGIC GLOBAL REGISTERS IRQN IACKN INTERRUPT ARBITRATION 8 DUART COMMON AB 18 4 4 4 ÷ 2 SD00180 |
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