© Elcom s. r. o.
Service manual
Euro 2500
TX
15
Pin #
Description
Type
Signal description
1
VRAM
I
+5V power supply
2
FAULT
I
Printer failure signaling
3
KB-DATA
I/O
External PC keyboard data
4
A2P
O
Control of 1.direct phase of 2.printer stepping motor
5
B2P
O
Control of 2.direct phase of 2.printer stepping motor
6
TRANEN
O
RS-422 interface control
7
SCR/FM
O
Data collection from FM or from bar code scanner
8
CS7
O
Fast printing circuit activation
9
PR-SEL
O
Signal collection from LATCH circuit
10
NC
NC
11
GND
I
GND
12
TXD0
O
Serial data output, channel 0
13
TXD1
O
Serial data output, channel 1
14
RXD0
I
Serial data input, channel 0
15
RXD1
I
Serial data input, channel 1
16
IRQU1
I
Interruption from DUART channel #1
17
IRQU2
I
Interruption from DUART channel #2
18
EX1-SEL
I/O
Choice of 1. alphanumeric display controller
19
EX1-CLK
I/O
Clock impulses for 1. alphanumeric LCD controller
20
EX1-DATA
I/O
Data for 1. alphanumeric LCD controller
21
EX2-SEL
I/O
Choice of external segmented display controller
22
GND
I
GND
23
EX2-CLK
I/O
Clock impulses for external LCD controller and insertion test
24
EX2-DATA
I/O
Data for external segmented LCD controller
25
DRAWER1
O
Control signal for 1.drawer opening
26
DRAWER2
O
Control signal for 2.drawer opening
27-34
D0-D7
I/O
Data bus
35
VRAM
I
+5V power supply
36-43
A0-A7
O
Lower part of address
44
GND
I
GND
45-55
A8-A18
O
Upper part of address
56
A19
O
Address conductor
57
GND
I
GND
58
LCD-SEL
O
Choice of internal segmented display controller
59
LCD-CLK
I/O
Clock impulses for internal LCD controller and insertion test
60
LCD-DATA
O
Data for internal segmented LCD controller
61
SYSCLK
O
System clock impulses
62
STBY
I
Choice of power saving mode
63
RST
I
Reset signal
64
NMI
I
Unmasked interference input
65
GND
I
GND
66
EXTAL
I
Input for external crystal
67
XTAL
I
Input for external crystal
68
VRAM
I
+5 power supply
69
NC
NC
70
RD
O
Permission to read the data from activated circuit
71
HWR
O
Permission to put the data to activated circuit
72
NC
NC
73-75
MD0-MD2
I
Choice of processor operating mode
76
VRAM
I
+5V power supply
77
VRAM
I
+5V power supply
78
PAP1
I
Scanning paper ribbon presence in printer
Tab. 2.1: Pin description for E-2500N
Содержание Euro-2500 Series
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