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87C552 Datasheet(PDF) 14 Page - NXP Semiconductors |
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87C552 Datasheet(HTML) 14 Page - NXP Semiconductors |
14 / 24 page ![]() Philips Semiconductors Product specification 87C552 80C51 8-bit microcontroller 8K/256 OTP, 8 channel 10 bit A/D, I2C, PWM, capture/compare, high I/O 1998 May 01 14 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 DPH A8–A15 FROM PCH tWHLH tLLWL tWLWH tAVLL tAVWL tQVWX tWHQX tDW SU00213 Figure 4. External Data Memory Write Cycle 0.8V tLOW tHIGH VIH1 VIH1 0.8V tCLCL tr tf VIH1 VIH1 0.8V 0.8V SU00214 Figure 5. External Clock Drive XTAL1 0 1 2 3 4 5 678 INSTRUCTION ALE CLOCK OUTPUT DATA WRITE TO SBUF INPUT DATA CLEAR RI VALID VALID VALID VALID VALID VALID VALID VALID SET TI SET RI tXLXL tQVXH tXHQX tXHDX tXHDV SU00027 12 3 0 456 7 Figure 6. Shift Register Mode Timing |
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