P89C51RB2/P89C51RC2/P89C51RD2 80C51 8-bit Flash ...

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Philips Semiconductors80C51 8-bit Flash microcontroller family16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAMPreliminary specificationP89C51RB2/P89C51RC2/P89C51RD2ALEt WHLHPSENt LLWLt WLWHWRt LLAXt AVLL t QVWXt WHQXt AVWLt QVWHPORT 0A0–A7FROM RI OR DPL DATA OUT A0–A7 FROM PCL INSTR INPORT 2P2.0–P2.7 OR A8–A15 FROM DPFA0–A15 FROM PCHSU00026Figure 31. External Data Memory Write CycleINSTRUCTION0 1 2 3 4 5 6 7 8ALEt XLXLCLOCKOUTPUT DATAWRITE TO SBUFINPUT DATACLEAR RItt QVXH0 1 2 34 5 6 7XHQXt XHDXt XHDVSET TIVALID VALID VALID VALID VALID VALID VALID VALIDSET RIFigure 32. Shift Register Mode TimingSU00027V CC –0.50.45V0.7V CC0.2V CC –0.1t CHCXt CHCL t CLCX t CLCHt CLCLSU00009Figure 33. External Clock Drive1999 Nov 22 36
Philips Semiconductors80C51 8-bit Flash microcontroller family16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAMPreliminary specificationP89C51RB2/P89C51RC2/P89C51RD2V CC –0.50.45V0.2V CC +0.90.2V CC –0.1V LOADV LOAD +0.1VV LOAD –0.1VTIMINGREFERENCEPOINTSV OH –0.1VV OL +0.1VNOTE:AC inputs during testing are driven at V CC –0.5 for a logic ‘1’ and 0.45V for a logic ‘0’.Timing measurements are made at V IH min for a logic ‘1’ and V IL max for a logic ‘0’.Figure 34. AC Testing Input/OutputSU00717NOTE:For timing purposes, a port is no longer floating when a 100mV change fromload voltage occurs, and begins to float when a 100mV change from the loadedV OH /V OL level occurs. I OH /I OL ≥ ±20mA.Figure 35. Float WaveformSU007186050I CC (mA)4089C51RB2/RC2/RD2MAXIMUM ACTIVE I CCTYPICAL ACTIVE I CC302010MAXIMUM IDLETYPICAL IDLE2 4 6 8 10 12 14 16 1820Frequency at XTAL1 (MHz, 6 clock mode)SU01300Figure 36. I CC vs. FREQValid only within frequency specifications of the device under testV CC –0.50.45V0.2V CC +0.90.2V CC –0.1NOTE:AC inputs during testing are driven at V CC –0.5 for a logic ‘1’ and 0.45V for a logic ‘0’.Timing measurements are made at V IH min for a logic ‘1’ and V IL max for a logic ‘0’.Figure 37. AC Testing Input/OutputSU000101999 Nov 22 37
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P89C51RB2/P89C51RC2/P89C51RD2 80C51 8-bit Flash ...

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