N87C51RC24 Intel, N87C51RC24 Datasheet
N87C51RC24
Specifications of N87C51RC24
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N87C51RC24 Summary of contents
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... Information in this document is provided in connection with Intel products Intel assumes no liability whatsoever including infringement of any patent or copyright for sale and use of Intel products except as provided in Intel’s Terms and Conditions of Sale for such products Intel retains the right to make changes to these specifications at any time without notice Microcomputer Products may have minor variations to this specification known as errata ...
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RB RC Table 1 Proliferations Options 1 Standard -1 80C51RA X X 83C51RA X X 87C51RA X X 83C51RB X X 87C51RB X X 83C51RC X X 87C51RC X X Figure 1 8XC51RX Block Diagram 2 NOTES -20 -24 ...
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... PROCESS INFORMATION This device is manufactured on P629 5 a CHMOS III-E process Additional process and reliability infor- mation is available in the Intel ® Quality System Handbook. DIP Do not connect reserved pins PACKAGES Part Prefix 8XC51RX P 8XC51RX N 8XC51RX S 272659–1 QFP Figure 2 Pin Connections 8XC51RA RB RC ...
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RB RC PIN DESCRIPTIONS V Supply voltage CC V Circuit ground SS V Secondary ground (not on DIP) Provided to SS1 reduce ground bounce and improve power supply by-passing NOTE This pin is not a substitute for the V ...
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This pin (ALE PROG) is also the program pulse input during EPROM programming for the 87C51RX In normal operation ALE is emitted at a constant rate of the oscillator frequency and may be used for external timing or ...
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RB RC Table 2 Status of the External Pins during Idle and Power Down Program Mode ALE Memory Idle Internal 1 Idle External 1 Power Down Internal 0 Power Down External 0 Mode will be exited if the chip ...
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... While the 8XC51RX is in this mode an emulator or test CPU can be used to drive the circuit Normal operation is restored when a normal reset is applied 8XC51RX EXPRESS The Intel EXPRESS system offers enhancements to the operational specifications of the MCS 51 family of microcontrollers These EXPRESS products are designed to meet the needs of those applications ...
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... ALE PSEN) 8 NOTICE This data sheet contains information on products in the sampling and initial production phases development The specifications are subject to change without notice Verify with your local Intel 150 C a Sales office that you have the latest data sheet be ...
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DC CHARACTERISTICS (Over Operating Conditions) (Continued) All parameter values apply to all devices unless otherwise indicated Symbol Parameter V Output High Voltage OH1 (Port 0 in External Bus Mode) V Output High Voltage OH2 (RST) I Logical 0 Input Current ...
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Max at other frequencies is given by CC Active Mode I Max 2 2 Freq Idle Mode I Max 0 5 Freq Where Freq ...
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EXPLANATION OF THE AC SYMBOLS Each timing symbol has 5 characters The first char- acter is always a ‘T’ (stands for time) The other characters depending on their positions stand for the name of a signal or the logical status ...
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RB RC EXTERNAL MEMORY CHARACTERISTICS All parameter values apply to all devices unless otherwise indicated Oscillator Symbol Description Min TPXIZ Input Instruction Float After PSEN 8XC51RX 8XC51RX-24 TAVIV Address to Valid Instruction In TPLAZ PSEN Low to Address Float ...
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EXTERNAL PROGRAM MEMORY READ CYCLE EXTERNAL DATA MEMORY READ CYCLE EXTERNAL DATA MEMORY WRITE CYCLE 8XC51RA RB RC 272659 –12 272659 –13 272659 –14 13 ...
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RB RC SERIAL PORT TIMING - SHIFT REGISTER MODE Test Conditions Over Operating Conditions Load Capacitance 12 MHz Oscillator Symbol Parameter Min Max TXLXL Serial Port Clock 1 Cycle Time TQVXH Output Data 700 Setup to Clock Rising Edge ...
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EXTERNAL CLOCK DRIVE Symbol Parameter 1 TCLCL Oscillator Frequency 8XC51RX 8XC51RX-1 8XC51RX-20 8XC51RX-24 TCHCX High Time TCLCX Low Time TCLCH Rise Time 8XC51RX 8XC51RX-24 TCHCL Fall Time20 8XC51RX 8XC51RX-24 EXTERNAL CLOCK DRIVE WAVEFORM AC TESTING INPUT OUTPUT WAVEFORMS AC Inputs ...
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RB RC PROGRAMMING THE EPROM The part must be running with a 4 MHz to 6 MHz oscillator The address of an EPROM location to be programmed is applied to address lines while the code byte to be programmed ...
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See Table 4 for proper input on these pins Figure 10 Programming the EPROM PROGRAMMING ALGORITHM Refer to Table 4 and Figures 10 and 11 for address data and control signals set up To program the 87C51RX the following sequence ...
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RB RC ROM and EPROM Lock System The program lock system when programmed pro- tects the onboard program against software piracy The 83C51RX has a one-level program lock system and a 64-byte encryption table See line 2 of Table ...
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Table 5 Program Lock Bits and the Features Program Lock Bits LB1 LB2 LB3 Program Lock features enabled (Code verify will still be encrypted by the Encryption Array if programmed ) ...
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