N87C51GB Intel Corporation, N87C51GB Datasheet
N87C51GB
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N87C51GB Summary of contents
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... 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 COPYRIGHT INTEL CORPORATION 1995 8XC51GB Commercial Express ...
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Figure 1 8XC51GB Block Diagram PROCESS INFORMATION This device is manufactured on P629 0 a CHMOS III-E process Additional process and reliability infor- mation is available in Intel’s Components Quality and Reliability Handbook Order No 210997 2 PACKAGES Part ...
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PARALLEL I O PORTS The 8XC51GB contains six 8-bit parallel I O ports All six ports are bidirectional and consist of a latch an output driver and an input buffer Many of the port pins have multiplexed I O and ...
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ALTERNATE PORT FUNCTIONS Ports and 5 have alternate functions as well as their I O function as described below Port Pin P0 0 ADO– AD7 T2EX P1 ...
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This pin also receives the 12 75V programming sup- ply voltage (V ) during programming (OTP only) PP XTAL1 Input to the inverting oscillator amplifier XTAL2 Output from the inverting oscillator amplifi CONVERTER The 8XC51GB A D ...
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for Crystals e g For Ceramic Resonators contact resonator manufacturer Figure 4 Oscillator Connections Figure 5 External Clock Drive Configuration IDLE MODE The user’s software can invoke the Idle Mode When the microcontroller ...
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... C The 87C51GB EXPRESS is packaged in a the 68-lead PLCC package In order to designate a part as an EXPRESS part a ‘‘T’’ is added as a prefix to the part number TN87C51GB denotes an EX- PRESS part in a PLCC package All AC and DC parameters in this data sheet apply to the EXPRESS devices ...
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ABSOLUTE MAXIMUM RATINGS Ambient Temperature under Bias Storage Temperature Voltage Pin per I O Pin OL Voltage on Any Other Pin ...
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DC CHARACTERISTICS (Over Operating Conditions) (Continued) Symbol Parameter V Output High Voltage OH (Ports and 5 ALE PSEN) V Output High Voltage OH1 (Port 0 in External Bus Mode) I Logical 0 Input Current IL (Ports ...
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I Max at other frequencies is given by CC Active Mode I Max (Osc Freq Idle Mode I Max (Osc Freq Where Osc Freq is in ...
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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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EXTERNAL PROGRAM MEMORY READ CYCLE EXTERNAL DATA MEMORY READ CYCLE EXTERNAL DATA MEMORY WRITE CYCLE 12 272337 –11 272337 –12 272337 –13 ...
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SERIAL PORT TIMING SHIFT REGISTER MODE Test Conditions Over Operating Conditions Load Capacitance Symbol Parameter TXLXL Serial Port Clock Cycle Time TQVXH Output Data Setup to Clock Rising Edge TXHQX Output Data Hold after Clock Rising Edge TXHDX Input Data ...
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SEP AC TIMING SPECIFICATIONS Test Conditions Over Operating Conditions Load Capacitance Symbol Parameter TXSXL SEPCLK Cycle Time TXSST Output Data Setup to SEPCLK TXSOH Output Data Hold after SEPCLK TXSIH Input Data Hold after SEPCLK Sampling Edge TXSDV Input ...
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AC TESTING INPUT OUTPUT WAVEFORMS AC inputs during testing are driven ‘‘1’’ and 0 5V for a Logic ‘‘0’’ Timing measurements are made at V for a Logic ‘‘1’’ and V max for a Logic ‘‘0’’ IH ...
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A D CONVERTER SPECIFICATIONS Parameter Temperature Coefficients Offset Full Scale Differential Non-Linearity Input Capacitance Off Isolation Feedthrough V Power Supply Rejection CC Input Resistance to Sample-and-Hold Capacitor DC Input Leakage NOTES These values are expected for most parts at ...
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PROGRAMMING THE OTP The part must be running with a 4 MHz to 6 MHz oscillator The address of a location to be pro- grammed is applied to address lines while the code byte to be programmed in that location ...
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PROGRAMMING ALGORITHM Refer to Table 2 and Figures 11 and 12 for address data and control signals set up To program the 87C51GB the following sequence must be exer- cised 1 Input the valid address on the address lines ...
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ROM and EPROM Lock System The 87C51GB and the 83C51GB program lock sys- tems when programmed protect the on-board pro- gram against software piracy The 83C51GB has a one-level program lock system and a 64-byte encryption table See line 2 ...
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OTP PROGRAMMING AND VERIFICATION CHARACTERISTICS ( 20 Symbol Parameter V Programming Supply Voltage PP I Programming Supply Current PP 1 TCLCL Oscillator Frequency TAVGL Address Setup ...
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A D Glossary of Terms Absolute Error The maximum difference between corresponding actual and ideal code transitions Ab- solute Error accounts for all deviations of an actual converter from an ideal converter Actual Characteristic The characteristic of an ac- tual ...
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Sample Window Begins when the sample capaci- tor is attached to a selected channel and ends when the sample capacitor is disconnected from the se- lected channel Successive Approximation conversion method which uses a binary search ...