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P80C32 Arkusz danych(PDF) 28 Page - NXP Semiconductors |
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P80C32 Arkusz danych(HTML) 28 Page - NXP Semiconductors |
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28 / 62 page ![]() Philips Semiconductors Product data P80C3xX2; P80C5xX2; P87C5xX2 80C51 8-bit microcontroller family 4K/8K/16K/32K ROM/OTP, low voltage (2.7 to 5.5 V), low power, high speed (30/33 MHz) 2003 Jan 24 28 80C51 Internal Bus SBUF Zero Detector D Q S CL Write to SBUF TX Control TX Clock Send Data Start RX Control Start Load SBUF RX Clock T1 Serial Port Interrupt Input Shift Register (9 Bits) Load SBUF Shift SBUF Read SBUF 80C51 Internal Bus TxD TB8 ÷ 16 1-to-0 Transition Detector Sample ÷ 2 SMOD = 1 SMOD = 0 Shift Bit Detector RxD Stop Bit Gen. Mode 2 Phase 2 Clock (1/2 fOSC in 12-clock mode; fOSC in 6-clock mode) R1 ÷ 16 Shift 1FFH Transmit Send S1P1 Shift TX Clock Write to SBUF Start Bit TxD Stop Bit D0 D1 D2 D3 D4 D5 D6 D7 TI RX Clock ÷ 16 Reset Start Bit RxD Stop Bit D0 D1 D2 D3 D4 D5 D6 D7 Bit Detector Sample Times Shift RI Receive Data (SMOD is PCON.7) TB8 RB8 Stop Bit Gen. SU01627 Figure 16. Serial Port Mode 2 |
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