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P89C668 Datasheet(PDF) 43 Page - NXP Semiconductors |
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P89C668 Datasheet(HTML) 43 Page - NXP Semiconductors |
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43 / 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 43 80C51 Internal Bus SBUF Zero Detector D Q S CL Write to SBUF TX Control TX Clock Send Shift Start S6 RX Control Start Shift Receive RX Clock T1 R1 Serial Port Interrupt 1 1 1 1 1 1 1 0 Input Shift Register REN RI Load SBUF Shift Shift Clock RxD P3.0 Alt Output Function TxD P3.1 Alt Output Function SBUF Read SBUF 80C51 Internal Bus RxD P3.0 Alt Input Function Write to SBUF S6P2 Send Shift RxD (Data Out) D0 D1 D2 D3 D4 D5 D6 D7 Transmit TxD (Shift Clock) TI S3P1 S6P1 Write to SCON (Clear RI) RI Receive Shift RxD (Data In) D0 D1 D2 D3 D4 D5 D6 TxD (Shift Clock) S5P2 Receive D7 ALE S4 . . S1 S6 . . . . S1 S6 . . . . S1 S6 . . . . S1 S6 . . . . S1 S6 . . . . S1 S6 . . . . S1 S6 . . . . S1 S6 . . . . S1 S6 . . . . S1 S6 . . . . S1 SU00539 LSB LSB MSB MSB Figure 28. Serial Port Mode 0 |
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