Instruction/ maintenance manual of the product 80C51FA Intel
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AUTOMOTIVE 80C51FA/83C51FA 270501 ± 1 Figure 1. 83C51FA Block Diagram 2.
AUTOMOTIVE 80C51FA/83C51FA 80C51FA/83C51FA PRODUCT OPTIONS Intel’s extended and automotive temperature range product s are designed to meet the needs of those application s whose operating requirements exceed commercia l standards.
AUTOMOTIVE 80C51FA/83C51FA PIN DESCRIPTIONS V CC : Supply voltage. V SS : Circuit ground. Port 0 : Port 0 is an 8-bit, open drain, bidirectional I/O port. As an output port each pin can sink several LS TTL inputs. Port 0 pins that have 1's written to them float, and in that state can be used as high-im- pedance inputs.
AUTOMOTIVE 80C51FA/83C51FA addresses (MOVX @ Ri), Port 2 emits the contents of the P2 Special Function Register. Port 3 : Port 3 is an 8-bit bidirectional I/O port with internal pullups.
AUTOMOTIVE 80C51FA/83C51FA 270501 ± 6 Figure 5. External Clock Drive Configuration IDLE MODE The user's software can invoke the Idle Mode. When the microcontroller is in this mode, power consump- tion is reduced. The Special Function Registers and the onboard RAM retain their values during Idle, but the processor stops executing instructions.
AUTOMOTIVE 80C51FA/83C51FA ABSOLUTE MAXIMUM RATINGS * Ambient Temperature Under Bias ...................................-40°C to +125°C Storage Temperature .......................-65°C to +150°C Voltage on Any Other Pin to V SS ........-0.5V to +6.
AUTOMOTIVE 80C51FA/83C51FA DC CHARACTERISTICS : (T A eb 40 § Ct o a 125 § C; V CC e 5V g 10%; V SS e 0V) (Continued) Symbol Parameter Min Typ Max Unit Test Conditions I TL Logical 1 to 0 Transition .
AUTOMOTIVE 80C51FA/83C51FA 270501 ± 7 I CC Max at other frequencies is given by: Active Mode I CC Max e (3 c Osc Freq) a 4 Idle Mode I CC Max e (0.49 c Osc Freq) a 1.6 Where Osc Freq is in MHz, I CC is in mA. Figure 6. I CC vs Frequency 270501 ± 8 TCLCH e TCHCL e 5n s Figure 7.
AUTOMOTIVE 80C51FA/83C51FA 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 of that signal.
AUTOMOTIVE 80C51FA/83C51FA EXTERNAL PROGRAM MEMORY READ CYCLE 270501 ± 12 EXTERNAL DATA MEMORY READ CYCLE 270501 ± 13 EXTERNAL DATA MEMORY WRITE CYCLE 270501 ± 14 11.
AUTOMOTIVE 80C51FA/83C51FA SERIAL PORT TIMING-SHIFT REGISTER MODE Test Conditions : T A eb 40 § Ct o a 125 § C; V CC e 5V g 10%; V SS e 0V; Load Capacitance e 80 pF Symbol Parameter 12 MHz Oscillato.
AUTOMOTIVE 80C51FA/83C51FA AC TESTING INPUT, OUTPUT WAVEFORMS 270501 ± 17 AC Inputs during testing are driven at V CC b 0.5V 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 OL max for a Logic ``0''.
An important point after buying a device Intel 80C51FA (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
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If you already are a holder of Intel 80C51FA, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Intel 80C51FA.
However, one of the most important roles played by the user manual is to help in solving problems with Intel 80C51FA. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Intel 80C51FA along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
