at89c4051-12si ATMEL Corporation, at89c4051-12si Datasheet
at89c4051-12si
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at89c4051-12si Summary of contents
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... Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard MCS-51 instruction set. By combining a versa- tile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C4051 is a powerful microcontroller which provides a highly-flexible and cost-effective solution to many embedded control applications. ...
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... Pin Configuration 2.1 PDIP/SOIC 3. Block Diagram AT89C4051 2 RST/VPP 1 20 VCC (RXD) P3 P1.7 (TXD) P3 P1.6 XTAL2 4 17 P1.5 XTAL1 5 16 P1.4 (INT0) P3 P1.3 (INT1) P3 P1.2 (TO) P3 P1.1 (AIN1) (T1) P3 P1.0 (AIN0) GND 10 11 P3.7 1001E–MICRO–6/05 ...
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... I/O pin. The Port 3 output buffers can sink 20 mA. When 1s are written to Port 3 pins they are pulled high by the internal pullups and can be used as inputs. As inputs, Port 3 pins that are externally being pulled low will source current (I Port 3 also serves the functions of various special features of the AT89C4051 as listed below: Port Pin P3.0 P3 ...
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... Figure 5-1. Note: Figure 5-2. AT89C4051 4 Oscillator Connections C1 ± for Crystals = 40 pF ± for Ceramic Resonators External Clock Drive Configuration Figure 5-1 ...
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... User software should not write 1s to these unlisted locations, since they may be used in future products to invoke new features. In that case, the reset or inactive values of the new bits will always be 0. Table 6-1. AT89C4051 SFR Map and Reset Values 0F8H B 0F0H 00000000 ...
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... MOVX-related Instructions, Data Memory The AT89C4051 contains 128 bytes of internal data memory. Thus, in the AT89C4051 the stack depth is limited to 128 bytes, the amount of available RAM. External DATA memory access is not supported in this device, nor is external Program memory execution. Therefore, no MOVX [ ...
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... CC drops below the detection threshold, all port pins (except P1.0 and P1.1) are weakly CC goes back up again, an internal Reset is automatically generated after 2.1V PORT PIN INTERNAL RESET AT89C4051 2.1V 15 msec. 7 ...
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... RST to “L” Turn V Data Polling: The AT89C4051 features Data Polling to indicate the end of a write cycle. During a write cycle, an attempted read of the last byte written will result in the complement of the writ- ten data on P1.7. Once the write cycle has been completed, true data is valid on all outputs, and the next cycle may begin ...
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... P3.5 and P3.7 must be pulled to a logic low. The values returned are as follows. (000H) = 1EH indicates manufactured by Atmel (001H) = 41H indicates AT89C4051 13. Programming Interface Every code byte in the Flash array can be written and the entire array can be erased by using the appropriate combination of control signals ...
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... Figure 13-1. Programming the Flash Memory Figure 13-2. Verifying the Flash Memory AT89C4051 10 AT89C4051 P3.1 RDY/BSY PP AT89C4051 1001E–MICRO–6/05 ...
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... PROG High to BUSY Low GHBL t Byte Write Cycle Time WC t RDY/BSY\ to Increment Clock Delay BHIH t Increment Clock High IHIL Note: 1. Only used in 12-volt programming mode. 15. Flash Programming and Verification Waveforms 1001E–MICRO–6/05 PP AT89C4051 Min Max Units 11.5 12.5 V 250 µA 1.0 µs 1.0 µs 1.0 µs 10 µ ...
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... Under steady state (non-transient) conditions, I Maximum I per port pin Maximum total I for all output pins exceeds the test condition than the listed test conditions. 2. Minimum V for Power-down is 2V. CC AT89C4051 12 *NOTICE: Condition (Except XTAL1, RST) (XTAL1, RST mA mA 2.7V ...
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... Symbol Parameter 1/t Oscillator Frequency CLCL t Clock Period CLCL t High Time CHCX t Low Time CLCX t Rise Time CLCH t Fall Time CHCL 1001E–MICRO–6/ 2.7V to 6.0V CC Min Max AT89C4051 V = 4.0V to 6.0V CC Min Max Units 0 24 MHz 41 ...
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... V max. for a logic 0. IL (1) 23. Float Waveforms Note: 1. For timing purposes, a port pin is no longer floating when a 100 mV change from load voltage occurs. A port pin begins to float when 100 mV change from the loaded V AT89C4051 14 12 MHz Osc Min Max 1.0 700 50 ...
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... FREQUENCY (MHz) TYPICAL ICC vs. VOLTAGE- POWER DOWN (85˚ µ 3.0V 4.0V Vcc VOLTAGE 1. XTAL1 tied to GND 2. P.1.0 and P1 GND CC 3. Lock bits programmed AT89C4051 AT89C4051 Vcc=6.0V Vcc=5.0V Vcc=3. AT89C4051 Vcc=6.0V Vcc=5.0V Vcc=3. AT89C4051 5.0V 6.0V 15 ...
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... Ordering Information 27.1 Standard Package Speed Power (MHz) Supply Ordering Code AT89C4051-12PC AT89C4051-12SC 12 2.7V to 6.0V AT89C4051-12PI AT89C4051-12SI AT89C4051-24PC AT89C4051-24SC 24 4.0V to 6.0V AT89C4051-24PI AT89C4051-24SI 27.2 Green Package Option (Pb/Halide-free) Speed Power (MHz) Supply Ordering Code AT89C4051-12PU 12 2.7V to 6.0V AT89C4051-12SU AT89C4051-24PU 24 4.0V to 6.0V AT89C4051-24SU 20P3 20-lead, 0.300” Wide, Plastic Dual In-line Package (PDIP) 20S 20-lead, 0.300” ...
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... Mold Flash or Protrusion shall not exceed 0.25 mm (0.010"). 2325 Orchard Parkway San Jose, CA 95131 R 1001E–MICRO–6/05 D PIN TITLE 20P3, 20-lead (0.300"/7.62 mm Wide) Plastic Dual Inline Package (PDIP) AT89C4051 E1 A1 COMMON DIMENSIONS (Unit of Measure = mm) SYMBOL MIN NOM A – – A1 0.381 – D 24.892 – ...
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... SOIC Dimensions in Millimeters and (Inches). Controlling dimension: Inches. JEDEC Standard MS-013 PIN 1 ID 2325 Orchard Parkway San Jose, CA 95131 R AT89C4051 18 0.51(0.020) 0.33(0.013) PIN 1 1.27 (0.050) BSC 13.00 (0.5118) 12.60 (0.4961) 0.30(0.0118) 0.10 (0.0040) 0º ~ 8º 1.27 (0.050) 0.40 (0.016) TITLE 20S, 20-lead, 0.300" Body, Plastic Gull Wing Small Outline (SOIC) 10 ...
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... Atmel does not make any commitment to update the information contained herein. Atmel’s products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life. © Atmel Corporation 2005. All rights reserved. Atmel registered trademarks or trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others. Atmel Operations Memory ...