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87C524 Datasheet(PDF) 15 Page - NXP Semiconductors |
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87C524 Datasheet(HTML) 15 Page - NXP Semiconductors |
15 / 26 page Philips Semiconductors Product specification 87C524/87C528 80C51 8-bit microcontrollers 16K/32K, 512 OTP, I2C, watchdog timer 1999 Jul 23 15 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 SU00069 Figure 3. External Data Memory Write Cycle 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 4. Shift Register Mode Timing |
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