5 5 4 4 3 3 2 2 1 1 D D C C B B A A RS RW D0 D1 D2 D3 D4 D5 D6 D7 E UPUP RST SCL SDA XTAL1 XTAL2 SDA D0XTAL2 D1 XTAL1 D2 D3 D4 RST D6 D5 D7 RS RW E DNDN OK SCL RST VCC MISO SCK MOSI SCK MISO MOSI SDA 0 0 5VCC 5VCC 5VCC 0 5VCC 0 0 0 5VCC 5VCC 5VCC 0 0 5VCC 0 0 0 5VCC Title Size Document Number Rev Date: Sheet of <Doc> <RevCode> <Title> A4 1 1Thursday, April 24, 2014 Title Size Document Number Rev Date: Sheet of <Doc> <RevCode> <Title> A4 1 1Thursday, April 24, 2014 Title Size Document Number Rev Date: Sheet of <Doc> <RevCode> <Title> A4 1 1Thursday, April 24, 2014 Title Size Document Number Rev Date: Sheet of <Doc> <RevCode> <Title> A4 1 1Thursday, April 24, 2014 Title Size Document Number Rev Date: Sheet of <Doc> <RevCode> <Title> A4 1 1Thursday, April 24, 2014 Title Size Document Number Rev Date: Sheet of <Doc> <RevCode> <Title> A4 1 1Thursday, April 24, 2014 12 12 Y2 32.768H Y2 32.768H 12 SW1SW1 12 R2 8.2k R2 8.2k 12 R9 RESISTOR R9 RESISTOR 12 J2 CON2 J2 CON2 1 2 LCD U3 LCD LCD U3 LCD VSS 1 VDD 2 VEE 3 RS 4 RW 5 E 6 D0 7 D1 8 D2 9 D3 10 D4 11 D5 12 D6 13 D7 14 A 15 K 16 BT1 3V BT1 3V 12 SW2SW2 12 C1 CAP C1 CAP 12 U2 DS1307 U2 DS1307 GND 4 SQW/OUT 7 SDA 5 X1 1 X2 2 SCL 6 VBAT 3 VCC 8 R7R7 12 SW3SW3 12 12 J1 CON6 J1 CON6 1 2 3 4 5 6 R3 RES R3 RES 13 2 SW4SW4 12 C2 33P C2 33P 12 R8R8 12 C3 33P C3 33P 12 89S52 U1 89s52 89S52 U1 89s52 p1.0 (T2) 1 p1.1 (T2 EX) 2 p1.2 3 p1.3 4 p1.4 5 p1.5 ( MOSI) 6 p1.6 (MISO) 7 p1.7 (SCK) 8 RST 9 P3.0 10 P3.1 11 P3.2 12 P3.3 13 P3.4 14 P3.5 15 P3.6 16 P3.7 17 XTAL1 18 XTAL2 19 GND 20 P2.0 21 P2.1 22 P2.2 23 P2.3 24 P2.4 25 P2.5 26 P2.6 27 P2.7 28 PSEN 29 ALE/PROG 30 EA/VPP 31 P0.7 32 P0.6 33 P0.5 34 P0.4 35 P0.3 36 P0.2 37 P0.1 38 P0.0 39 VCC 40 Y1 12M Y1 12M 12 . A RS RW D0 D1 D2 D3 D4 D5 D6 D7 E UPUP RST SCL SDA XTAL1 XTAL2 SDA D0XTAL2 D1 XTAL1 D2 D3 D4 RST D6 D5 D7 RS RW E DNDN OK SCL RST VCC MISO SCK MOSI SCK MISO MOSI SDA 0 0 5VCC 5VCC 5VCC 0 5VCC 0 0 0 5VCC 5VCC 5VCC 0 0 5VCC 0 0 0 5VCC Title Size. 2014 12 12 Y2 32.768H Y2 32.768H 12 SW1SW1 12 R2 8.2k R2 8.2k 12 R9 RESISTOR R9 RESISTOR 12 J2 CON2 J2 CON2 1 2 LCD U3 LCD LCD U3 LCD VSS 1 VDD 2 VEE 3 RS 4 RW 5 E 6 D0 7 D1 8 D2 9 D3 10 D4 11 D5 12 D6 13 D7 14 A 15 K 16 BT1 3V BT1 3V 12 SW2SW2 12 C1 CAP C1 CAP 12 U2 DS1307 U2 DS1307 GND 4 SQW/OUT 7 SDA 5 X1 1 X2 2 SCL 6 VBAT 3 VCC 8 R7R7 12 SW3SW3 12 12 J1 CON6 J1 CON6 1 2 3 4 5 6 R3 RES R3 RES 13 2 SW4SW4 12 C2 33P C2 33P 12 R8R8 12 C3 33P C3 33P 12 89S52 U1 89s52 89S52 U1 89s52 p1.0 (T2) 1 p1.1 (T2 EX) 2 p1.2 3 p1.3 4 p1.4 5 p1.5 ( MOSI) 6 p1.6 (MISO) 7 p1.7 (SCK) 8 RST 9 P3.0 10 P3.1 11 P3.2 12 P3.3 13 P3.4 14 P3.5 15 P3.6 16 P3.7 17 XTAL1 18 XTAL2 19 GND 20 P2.0 21 P2.1 22 P2.2 23 P2.3 24 P2.4 25 P2.5 26 P2.6 27 P2.7 28 PSEN 29 ALE/PROG 30 EA/VPP 31 P0.7 32 P0.6 33 P0.5 34 P0.4 35 P0.3 36 P0.2 37 P0.1 38 P0.0 39 VCC 40 Y1 12M Y1 12M 12