Epson TM-U950 Technical Manual page 76

CONFIDENTIAL
Control circuitry
CPU (M37702)
The CPU controls all printer operations according to a control program in ROM. The CPU pin
assignments are shown in Table 2-1.
Table 2-1. CPU Pin Assignments
Pin
number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Rev. A
CPU function Signal designation
ANO V_DTC
P67 PFR2
P66 PFR1
P65 PFJ2
P64 PFJ1
P63 DSR
CSTRB(CSTB for the
P62
TM-U950P)
P61 PFR_HL
P60 PFJ_HL
P57 DKD_2
P56 DKD_1
P55 AC_2
P54 AC_1
P53 SHB
P52 ER_LED
P51 SL_LED
P50 CSOK
P47 STB
P46 CR_NM
P45 CR_HL
P44 CR_2
P43 CR_1
(0) FAI
(RDY) (RDY)
(HOLD) (HOLD)
BYTE BYTE
(CNV ) (CNV )
ss ss
(RESET) (RESET)
TM-U950/U950P Technical Manual
I/O Level Description
I Analog Detect 24 V voltage
O TTL Receipt paper feed motor Phase C,D
O TTL Receipt paper feed motor Phase A, B
O TTL Journal paper feed motor Phase C, D
O TTL Journal paper feed motor Phase A, B
DSR signal input from serial interface on the
I TTL
host
I TTL Not used (receive interrupt for the TM-U950P)
I/O TTL Receipt paper feed motor hold H = hold
I/O TTL Journal paper feed motor hold H = hold
O TTL Drawer kick-out drive signal 1 L = drive
O TTL Drawer kick-out drive signal 2 L = drive
O TTL Auto-cutter motor drive signal 2
O TTL Auto-cutter motor drive signal 1
O TTL Slip paper holder solenoid drive signal L=drive
O TTL Error LED drive signal L = ON
O TTL Slip paper LED drive signal L = ON
Slip paper eject detector LED drive signal L =
O TTL
ON
O TTL Stamp solenoid drive signal L = ON
Carriage motor control signal H = normal
O TTL
rotation
O TTL Carriage motor control signal H = hold
O TTL Carriage motor control signal Phase C, D
O TTL Carriage motor control signal Phase A, B
O TTL Receive interrupt
I TTL Fixed to H (pulled up to +5V)
I TTL Fixed to H (pulled up to +5 V)
I TTL Fixed to H (pulled up to +5V)
I TTL Fixed to H (connected to +5 V)
I TTL Reset signal input L = reset
Mechanism Configuration and Operating Principles 2-31