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P89C51RC2BA/01 Datasheet(PDF) 60 Page - NXP Semiconductors |
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P89C51RC2BA/01 Datasheet(HTML) 60 Page - NXP Semiconductors |
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60 / 68 page ![]() Philips Semiconductors Preliminary data P89C51RA2/RB2/RC2/RD2xx 80C51 8-bit Flash microcontroller family 8KB/16KB/32KB/64KB ISP/IAP Flash with 512B/512B/512B/1KB RAM 2002 Jul 18 60 tLLAX ALE PSEN PORT 0 PORT 2 WR A0–A7 FROM RI OR DPL DATA OUT A0–A7 FROM PCL INSTR IN P2.0–P2.7 OR A8–A15 FROM DPF A0–A15 FROM PCH tWHLH tLLWL tWLWH tAVLL tAVWL tQVWX tWHQX tQVWH SU00026 Figure 44. External Data Memory Write Cycle 0 1 2 3 4 5 678 INSTRUCTION ALE CLOCK OUTPUT DATA WRITE TO SBUF INPUT DATA CLEAR RI SET TI SET RI tXLXL tQVXH tXHQX tXHDX tXHDV SU00027 12 3 0 456 7 VALID VALID VALID VALID VALID VALID VALID VALID Figure 45. Shift Register Mode Timing VCC–0.5 0.45V 0.7VCC 0.2VCC–0.1 tCHCL tCLCL tCLCH tCLCX tCHCX SU00009 Figure 46. External Clock Drive |
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