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AT89LP51 数据表(PDF) 72 Page - ATMEL Corporation |
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AT89LP51 数据表(HTML) 72 Page - ATMEL Corporation |
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72 / 113 page ![]() 72 3709C–MICRO–5/11 AT89LP51/52 - Preliminary Figure 14-8. Serial Port Mode 3 TX CLOCK WRITE TO SBUF SEND DATA SHIFT TXD STOP BIT GEN TI D0 D1 D2 D3 D4 D5 D6 D7 TB8 STOP BIT START BIT INTERNAL BUS READ SBUF LOAD SBUF SBUF SHIFT INPUT SHIFT REG. (9 BITS) BIT DETECTOR 1-TO-0 TRANSITION DETECTOR SERIAL PORT INTERRUPT WRITE TO SBUF ÷2 SMOD1 TIMER 1 OVERFLOW RXD RX CLOCK RX CLOCK RX CONTROL START START DATA SAMPLE ÷16 ÷16 TX CONTROL TI ZERO DETECTOR SBUF TXD INTERNAL BUS TB8 D Q CL S LOAD SBUF SHIFT 1FFH SHIFT RI SEND D0 D1 D2 D3 D4 D5 D6 D7 RB8 START BIT STOP BIT ÷16 RESET RX CLOCK BIT DETECTOR SAMPLE TIMES SHIFT RXD RI STOP BIT TIMER 2 OVERFLOW TCLK RCLK “0” “0” “1” “1” “0” “1” |
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