AT89LP51-20AU Microchip

Features 8-bit Microcontroller Compatible with 8051 Products Enhanced 8051 Architecture Single Clock Cycle per Byte Fetch 12 Clock per Machine Cycle Compatibility Mode Up to 20 MIPS Throughput at 20 MHz Clock Frequency Fully Static Operation: 0 Hz to 20 MHz On-chip 2-cycle Hardware Multiplier 256 x 8 Internal RAM External Data/Program Memory Interface 8-bit Dual Data Pointers 4-level Interrupt Priority Microcontroller Nonvolatile Program and Data Memory 4K/8K Bytes of In-System Programmable (ISP) Flash Program Memory with 4K/8K 256 Bytes of Flash Data Memory 256-byte User Signature Array Bytes In-System Endurance: 10,000 Write/Erase Cycles Serial Interface for Program Downloading Programmable 64-byte Fast Page Programming Mode 3-level Program Memory Lock for Software Security Flash In-Application Programming of Program Memory Peripheral Features Three 16-bit Timer/Counters with Clock Out Modes Enhanced UART AT89LP51 Automatic Address Recognition Framing Error Detection AT89LP52 SPI and TWI Emulation Modes Programmable Watchdog Timer with Software Reset and Prescaler Special Microcontroller Features Brown-out Detection and Power-on Reset with Power-off Flag Selectable Polarity External Reset Pin Low Power Idle and Power-down Modes Interrupt Recovery from Power-down Mode Internal 1.8432 MHz Auxiliary Oscillator I/O and Packages Up to 36 Programmable I/O Lines Green (Pb/Halide-free) Packages 40-lead PDIP 44-lead TQFP/PLCC 44-pad VQFN/MLF Configurable Port Modes (per 8-bit port) Quasi-bidirectional (80C51 Style) Input-only (Tristate) Push-pull CMOS Output Open-drain Operating Conditions 2.4V to 5.5V V Voltage Range CC -40 C to 85C Temperature Range 0 to 20 MHz 2.4V5.5V 0 to 25 MHz 4.5V5.5V 3709DMICRO12/111. Pin Configurations 1.1 40-lead PDIP (T2) P1.0 1 40 VCC (T2 EX) P1.1 2 39 P0.0 (AD0) P1.2 3 38 P0.1 (AD1) P1.3 4 37 P0.2 (AD2) P1.4 5 36 P0.3 (AD3) (MOSI) P1.5 6 35 P0.4 (AD4) (MISO) P1.6 7 34 P0.5 (AD5) (SCK) P1.7 8 33 P0.6 (AD6) RST 9 32 P0.7 (AD7) (RXD) P3.0 10 31 POL (TXD) P3.1 11 30 P4.2 (ALE) (INT0) P3.2 12 29 P4.3 (PSEN) (INT1) P3.3 13 28 P2.7 (A15) (T0) P3.4 14 27 P2.6 (A14) (T1) P3.5 15 26 P2.5 (A13) (WR) P3.6 16 25 P2.4 (A12) (RD) P3.7 17 24 P2.3 (A11) (XTAL2) P4.1 18 23 P2.2 (A10) (XTAL1) P4.0 19 22 P2.1 (A9) GND 20 21 P2.0 (A8) 1.2 44-lead TQFP (MOSI) P1.5 1 33 P0.4 (AD4) (MISO) P1.6 2 32 P0.5 (AD5) (SCK) P1.7 3 31 P0.6 (AD6) RST 4 30 P0.7 (AD7) (RXD) P3.0 5 29 POL *NC 6 28 *NC (TXD) P3.1 7 27 P4.4 (ALE) (INT0) P3.2 8 26 P4.5 (PSEN) (INT1) P3.3 9 25 P2.7 (A15) (T0) P3.4 10 24 P2.6 (A14) (T1) P3.5 11 23 P2.5 (A13) 2 AT89LP51/52 3709DMICRO12/11 (WR) P3.6 12 44 P1.4 (RD) P3.7 13 43 P1.3 (XTAL2) P4.7 14 42 P1.2 (XTAL1) P4.6 15 41 P1.1 (T2 EX) GND 16 40 P1.0 (T2) *NC 17 39 *NC (A8) P2.0 18 38 VCC (A9) P2.1 19 37 P0.0 (AD0) (A10) P2.2 20 36 P0.1 (AD1) (A11) P2.3 21 35 P0.2 (AD2) (A12) P2.4 22 34 P0.3 (AD3)