AT89C51-16AI_1191543
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4-29 PQFP/TQFP 2 3 1 INDEX CORNER 3 4 P 1 . 0 V C C P 1 . 1 P 1 . 2 P 1 . 4 P 1 . 3 N C 4 2 4 3 40 41 6 5 4 44 3 2 2 6 2 5 2 8 2 7 2 4 1 8 1 9 2 0 2 1 2 2 P1.7 P1.6 P1.5 N C 7 8 9 1 0 1 1 1 2 1 3 14 1 5 1 6 1 7 2 9 3 0 3 9 3 8 3 7 36 3 5 3 3 3 2 31 N C PSEN X T A L 1 G N D X T A L 2 G N D P 0 . 0 ( A D 0 ) ALE/PROG ( ) P 3 . 7 R D EA/VPP ( ) P 3 . 6 W R (RXD) P3.0 P0.7 (AD7) P2.6 (A14) P0.6 (AD6) P0.5 (AD5) P0.4 (AD4) P 0 . 3 ( A D 3 ) P 0 . 2 ( A D 2 ) P 0 . 1 ( A D 1 ) ( ) P 3 . 2 INT0 (T XD) P3.1 (T1) P3.5 ( ) P 3 .3 INT1 (T0) P 3. 4 P2 .7 (A15) ( A 1 1 ) P 2 . 3 ( A 1 2 ) P 2 . 4 ( A 1 0 ) P 2 . 2 ( A 9 ) P 2 . 1 ( A 8 ) P 2 . 0 R S T P2 .5 (A13) Features • Compatible with MCS-51™ Products • 4K Bytes of In-System Reprogrammable Flash Memory – Endurance: 1,000 Write/Erase Cyc les • Fully Static Operation: 0 Hz to 24 MHz • Three-Level Program Memory Lock • 128 x 8-Bit Internal RAM • 32 Programmable I/O Lines • Two 16-Bit Timer/Counters • Six Interrupt Sources • Programmable Serial Channel • Low Power Idle and Power Down Modes Description The AT89C51 is a low-power, high-performance CMOS 8-bit microcomputer with 4K bytes of Flash Programmable and Erasable Read Only Memory (PEROM). The device is manufactured using Atmel’s high density nonvolatile memory technology and is compatible with the industry standard MCS-51™ instruction set and pinout. The on-chip Flash allows the program memory to be reprogrammed in-system or by a con- ventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C51 is a powerful microcomputer which provides a highly flexible and cost effective solution to many embedded control appli- cations. PDIP P1 . 0 V C C P1.1 P0.0 (AD0 ) P1.2 ( ) P 3 . 2 INT0 ALE/PROG ( ) P3 . 7 RD P 2 .3 ( A 11 ) (T XD) P3 .1 EA/VPP ( ) P3 . 6 W R P2.4 (A12 ) (RXD) P3 .0 P0.7 (AD7) (T1) P3.5 P2.6 (A14 ) RS T P0.6 (AD6 ) P1.7 P0 .5 (AD5) P1.6 P0 .4 (AD4) P1.5 P0.3 (AD3 ) P1.4 P0.2 (AD2 ) P1.3 P0.1 (AD1 ) ( ) P 3 . 3 INT1 PSEN X TA L 2 P 2. 2 ( A 10 ) (T0) P3.4 P2.7 (A15 ) X TA L 1 P 2 . 1 ( A 9 ) GND P 2 .0 ( A 8 ) P2 .5 (A13 ) 2 0 1 9 1 8 1 7 1 6 1 5 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 2 1 2 2 2 3 2 4 2 5 2 6 4 0 3 9 3 8 3 7 3 6 3 5 3 4 3 3 3 2 3 1 3 0 2 9 2 8 2 7 0265F-A–12/97 (continued) 8-Bit Microcontroller with 4K Bytes Flash AT89C51 Pin Configurations PLCC P 1 . 0 V C C P 1 . 1 P 0 . 0 ( A D 0 ) P 1 . 2 ALE/PROG ( ) P 3 . 7 R D X T A L 1 EA/VPP ( ) P 3 . 6 W R G N D (RXD) P3.0 P0.7 (AD7) P2.6 (A14) P0.6 (AD6) P0.5 (AD5) P0.4 (AD4) P 0 . 3 ( A D 3 ) P 1 . 4 P 0 . 2 ( A D 2 ) P 1 . 3 P 0 . 1 ( A D 1 ) PSEN X T A L 2 ( ) P 3 . 2 INT0 (TXD) P3.1 (T1) P3.5 ( ) P 3 . 3 INT1 (T0) P3.4 P2.7 (A15) ( A 1 1 ) P 2 . 3 ( A 1 2 ) P 2 . 4 ( A 1 0 ) P 2 . 2 ( A 9 ) P 2 . 1 ( A 8 ) P 2 . 0 N C 2 3 1 R S T P1.7 P1.6 P1.5 INDEX CORNER N C N C P2.5 (A13) 3 4 N C 4 2 43 4 0 41 6 5 4 4 4 3 2 2 6 2 5 2 8 2 7 1 8 1 9 2 0 2 4 2 1 2 2 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 2 9 3 0 3 9 3 8 3 7 3 6 3 5 3 3 3 2 3 1 查询A T 89C 51供应商
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