Table of Contents
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No
Pin Name
61
AVref
62
nIOCS0
63
nIOCS2/ToneOut
64
nIOCS3/BufferSel
65
Vssi
66
nSELECTIN
67
nFAULT
68
nAUTOFD
69
nINIT
70
SELECT
71
Vddp
72
PERROR
73
BUSY
74
nACK
75
Vssp
76
PD0
77
PD1
78
Vddi
79
PD2
80
PD3
81
Vssi
82
PD4
83
PD5
84
Vddo
85
PD6
86
PD7
87
nSTROBE
88
Vsso
89
RxD1 / CTin[2]
90
TxD1
Samsung Electronics
I/O
Reset Value
I
-
Analog Positve Reference
O
H
O
"
IO Chipselect 2 / ToneOut
O
"
IO Chipselect 2 / BufferSel
Vss
-
I
-
O
H
Fault for Error Condition
I
-
I
-
O
L
Vdd
-
O
L
O
"
O
H
Parallel Port Acknowledge
Vss
-
I/O
Input
I/O
"
Vcca
-
I/O
Input
I/O
"
Vssa
-
I/O
Input
I/O
"
Vdd
-
I/O
Input
I/O
"
I
-
Vss
-
I
-
O
H
- This Document can not be used without Samsung's authorization -
CIRCUIT DESCRIPTION
Description
IO Chipselect 0
3.3 V Gnd
Select Input
Auto Feed
Initialization
Parallel Port Select
5 V
Paper Error
Parallel Port Busy
5 V Gnd
Parallel Port Data 0
Parallel Port Data
3.3 V
Parallel Port Data
Parallel Port Data
3.3 V Gnd
Parallel Port Data
Parallel Port Data
5 V
Parallel Port Data
Parallel Port Data
Data Strobe
5 V Gnd
Uart 1 Rx Data
Uart 1 Tx Data
PAD
PICA
PHOB4, 4 mA
"
"
PHIL, ST
PHOB8, 8 mA
PHIL, ST
"
PHOB8, 8 mA
PHOB8, 8 mA
PHOB8, 8 mA
PHOB8, 8 mA
PHBTT8, 8 mA
"
for Ring OSC
PHBTT8, 8 mA
"
for Ring OSC
PHBTT8, 8 mA
"
PHBTT8, 8 mA
"
PHIL, ST
PHIL, ST
PHOB4, 4 mA
Repair Manual
3-5
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Table of Contents
Troubleshooting
