EP1C6Q240C6开发板原理图1 2 3 4 5 6 7 8 9 10 11 12 LCD SDRAM SEG IO4_34 IO4_33 IO4_31 IO4_30 IO2_36 IO2_37 IO2_38 IO2_39 IO3_1 IO3_2 IO3_3 IO3_4 IO3_13 IO3_12 IO3_11 IO3_10 IO3_9 IO2_42 IO2_41 IO2_40 IO3_38 IO3_39 IO3_40 IO3_41 IO3_42 IO4_4 IO4_5 IO4_6 IO4_3 IO4_2 IO4_1 IO3_33 IO3_32 IO3_31 IO3_30 IO3_29 2 4 5 7 8 10 11 13 74 76 77 79 80 82 83 85 31 33 34 36 37 39 40 42 45 47 48 50 51 53 54 56 R1 VCC_5V R2 R3 R4 81 75 55 49 43 41 35 29 15 9 3 1 U2 MT48LC4M32B2 86 84 78 72 58 52 46 44 38 32 12 6 VCC JP1 A 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Header 20 VCC_5V U3 U4 19 1 LCD_07 LCD_06 LCD_05 LCD_04 LCD_03 LCD_02 LCD_01 LCD_00 LCD_E LCD_RW LCD_DI 2 3 4 5 6 7 8 9 10 OE T/R A0 A1 A2 A3 A4 A5 A6 A7 GND SN74ALS245ADW VCC B0 B1 B2 B3 B4 B5 B6 B7 VCC_5V 20 18 17 16 15 14 13 12 11 IO2_2 IO2_3……