GSM based lcd dsiplay
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This document contains a list of pin connections for an AT89C52 microcontroller and other components in a circuit. It lists the pin numbers and names for the microcontroller and connections to an LCD display, crystal oscillator, capacitors, resistors, voltage regulator, and GSM modem. The microcontroller is connected to the modem's RXD and TXD pins for serial communication.
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GSM based lcd dsiplay
- 1. XTAL2 18 XTAL1 19 ALE 30 EA 31 PSEN 29 RST 9 P0.0/AD0 39 P0.1/AD1 38 P0.2/AD2 37 P0.3/AD3 36 P0.4/AD4 35 P0.5/AD5 34 P0.6/AD6 33 P0.7/AD7 32 P1.0/T2 1 P1.1/T2EX 2 P1.2 3 P1.3 4 P1.4 5 P1.5 6 P1.6 7 P1.7 8 P3.0/RXD 10 P3.1/TXD 11 P3.2/INT0 12 P3.3/INT1 13 P3.4/T0 14 P3.7/RD 17 P3.6/WR 16 P3.5/T1 15 P2.7/A15 28 P2.0/A8 21 P2.1/A9 22 P2.2/A10 23 P2.3/A11 24 P2.4/A12 25 P2.5/A13 26 P2.6/A14 27 U1 AT89C52 D7 14 D6 13 D5 12 D4 11 D3 10 D2 9 D1 8 D0 7 E 6 RW 5 RS 4 VSS 1 VDD 2 VEE 3 LCD1 LM044L RXD RTS TXD CTS C1 33pF C2 33pF X1 CRYSTAL C3 10uF R1 10k R2 10k 40% RV1 1k RX - TX goes to GSM Modem Connect Max232 if your modem does not have TTL Connectionshttp://www.8051projects.net