Samsung SRP-350PG - SRP 350 B/W Direct Thermal Printer Service Manual page 22

2 Product Specifications
2-5 Interface Specifications
2-5-3-(c) Signal Specification (Compatibility/Nibble/Byte mode)
Pin No. Source
1 Host
2 Host / Printer
3 Host / Printer
Host / Printer
4
5 Host / Printer
6 Host / Printer
7 Host / Printer
8 Host / Printer
9 Host / Printer
10 Printer
11 Printer
12 Printer
13 Printer
14 Host
15
16
17
18 Printer
19~30
31 Host
32 Printer
33
34 Printer
35 Printer
36 Host
2-14
Compatibility Mode
Nstrobe
Data 0 (LSB)
Data 1
Data 2
Data 3
Data 4
Data 5
Data 6
Data 7 (MSB)
Nack
Busy
Perror
Select
NautoFd
NC
GND
FG
Logic-H
GND
NInit
Nfault
GND
DK_Status
+5V
NselectIn
Table 2-16 IEEE1284 Pin Descirption
Nibble Mode
HostClk
-
-
-
-
-
-
-
-
PtrClk
PtrBusy /Data3,7
AckDataReq /Data2,6
Xflag /Data1,5
HostBusy
ND
GND
FG
Logic-H
GND
Ninit
nDataAvail /Data0,4
ND
ND
ND
1284-Active
Samsung Electro-Mechanics
Byte Mode
HostClk
Data 0 (LSB)
Data 1
Data 2
Data 3
Data 4
Data 5
Data 6
Data 7 (MSB)
PtrClk
PtrBusy
AckDataReq
Xflag
HostBusy
ND
GND
FG
Logic-H
GND
nInit
nDataAvail
ND
ND
ND
1284-Active