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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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P89C668 датащи(PDF) 49 Page - NXP Semiconductors |
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P89C668 датащи(HTML) 49 Page - NXP Semiconductors |
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49 / 89 page  Philips Semiconductors Product data P89C660/P89C662/P89C664/ P89C668 80C51 8-bit Flash microcontroller family 16KB/32KB/64KB ISP/IAP Flash with 512B/1KB/2KB/8KB RAM 2002 Oct 28 49 SMOD1 SMOD0 – POF LVF GF0 GF1 IDL PCON (87H) SM0 / FE SM1 SM2 REN TB8 RB8 TI RI S0CON (98H) D0 D1 D2 D3 D4 D5 D6 D7 D8 STOP BIT DATA BYTE ONLY IN MODE 2, 3 START BIT SET FE BIT IF STOP BIT IS 0 (FRAMING ERROR) SM0 TO UART MODE CONTROL 0 : S0CON.7 = SM0 1 : S0CON.7 = FE SU01452 Figure 33. UART Framing Error Detection SM0 SM1 SM2 REN TB8 RB8 TI RI S0CON (98H) D0 D1 D2 D3 D4 D5 D6 D7 D8 1 1 1 0 COMPARATOR 11 X RECEIVED ADDRESS D0 TO D7 PROGRAMMED ADDRESS IN UART MODE 2 OR MODE 3 AND SM2 = 1: INTERRUPT IF REN=1, RB8=1 AND “RECEIVED ADDRESS” = “PROGRAMMED ADDRESS” – WHEN OWN ADDRESS RECEIVED, CLEAR SM2 TO RECEIVE DATA BYTES – WHEN ALL DATA BYTES HAVE BEEN RECEIVED: SET SM2 TO WAIT FOR NEXT ADDRESS. SU01453 Figure 34. UART Multiprocessor Communication, Automatic Address Recognition |
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