Epson TM U200D Technical Reference - Page 61

CPU pin functions Pin CPU No. Function Signal Name 35 AD0 AD0 36 AD1 AD1 37 AD2 AD2 38 AD3 AD3 39 AD4 AD4 40 AD5 AD5 41 AD6 AD6 42 AD7 AD7 43 A8 A8 44 A9 A9 45 A10 A10 46 A11 A11 47 A12 A12 48 A13 A13 49 A14 A14 50 A15 A15 51 VSS VSS 52 P20 CR A/DSW1 53 P21 CR B/DSW2 54 P22 CR C/DSW3 55 P23 CR D/DSW4 56 P90 PF A/DSW5 57 P91 PF B/DSW6 58 P92 PF C/DSW7 59 P93 PF D/DSW8 60 RD RD 61 WR WR 62 P32 DKD1 63 P33 DKD2 64 P40 HEAD8 65 P41 HEAD7 66 P42 HEAD6 67 P43 HEAD5 68 P44 HEAD4 69 P45 HEAD3 I/O Level 3 state TTL O TTL I (0V) I/O TTL I/O TTL O TTL O TTL O TTL O TTL O TTL O TTL O TTL O TTL O TTL O TTL Description Address/data bus Transmit address (lower 8 bits) and data. Address bus (address upper 8 bits) GND terminal Motor, carriage drive control 2-2 phase excitation All the terminals on (low): hold DIP SW 1-1to 1-4 read when P100, P101 is low Motor, paper feed drive control 2-2 phase excitation All the terminals on (low): hold DIP SW 1-5 to 1-8 read when P100, P101 is low External memory data read signal External memory data write signal Drawer kick-out drive signal 1 Low: active Drawer kick-out drive signal 2 Low: active Print head #8 drive signal Low: on Print head #7 drive signal Low: on Print head #6 drive signal Low: on Print head #5 drive signal Low: on Print head #4 drive signal Low: on Print head #3 drive signal Low: on 2-20 Mechanism Configuration and Operating Principles Rev.B