Epson TM-U675 Service Manual page 234

Confidential
Table D-7 CPU terminals and functions
Port (Terminal)
Name
PB2/HLCAS1
PB3/HUCAS1
PB4/WE1
PA0/CAS0
PA1/UCAS0
PA2/OE0
PA3/OE1
PA4/WE0
DVSS
P85/CS5
P84/CS4
P83/CS3
P82/CS2
P81/CS1/RAS0
P80/CS0
DVCC
P76/BUSAK
P75/BUSRQ
P74
P73
P72/WRLH
P71/WRLL
P70/RD
DVSS
P00/D0
P01/D1
P02/D2
P03/D3
P04/D4
P05/D5
P06/D6
P07/D7
DVCC
Appendix D-46 Product Overview
Pin Description
No.
46 LED_PAPER
47 SEN_PWR
(sensor power On/Off)
48 PTLED_COM
49 MICR plunger (+)
50 MICR plunger (-)
51 SLIP plunger (+)
52 SLIP plunger (-)
53 EP-Power ON/OFF
54 GND
55 CS spare
56 EJM (electronic journal flash)
57 GA
58 ROM1 (external program)
59 RAM
60 ROM2 (FONT)
61 VCC
62 M190 motor drive signal 1
63 M190 motor drive signal 2
64 Solenoid drive 1
65 Solenoid drive 2
External memory write (D8  15)
66
External memory write (D0  7)
67
68 External memory read
69 GND
70 External data bus
71 External data bus
72 External data bus
73 External data bus
74 External data bus
75 External data bus
76 External data bus
77 External data bus
78 VCC
Circuit Signal I/O
Name
LED_PAPER OUT
SEN_PWR OUT
PTLED_COM OUT
MICR_SOL1 OUT
MICR_SOL2 OUT
SLIP_SOL1 OUT
SLIP_SOL2 OUT
EP_ON OUT
CS_RES OUT
CS_EJ OUT
CS_CG OUT
CS_PGM OUT
CS_RAM OUT
CS_GA OUT
EP_MOTOR1 OUT
EP_MOTOR2 OUT
LEVER1 OUT
LEVER2 OUT
WRH OUT
WRL OUT
RD OUT

D0

D1

D2

D3

D4

D5

D6

D7
I/O Definition
H L
On Off
Power off Power on
Power on Power off
EJM selected
Not selected
Font selected
Not selected
Program
Not selected
selected
External RAM
Not selected
selected
GA selected
Not selected
Not driven Driven

Brake
Open Driven
Open Driven
 
 
 
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
Rev.D