Samsung SCX-5312F - Page 122

3-5
Samsung Electronics
CIRCUIT DESCRIPTION
Repair Manual
No Pin Name I/O Reset Value Description PAD
61 AVref I - Analog Positve Reference PICA
62 nIOCS0 O H IO Chipselect 0 PHOB4, 4 mA
63 nIOCS2/ToneOut O " IO Chipselect 2 / ToneOut "
64 nIOCS3/BufferSel O " IO Chipselect 2 / BufferSel "
65 Vssi Vss - 3.3 V Gnd
66 nSELECTIN I - Select Input PHIL, ST
67 nFAULT O H Fault for Error Condition PHOB8, 8 mA
68 nAUTOFD I - Auto Feed PHIL, ST
69 nINIT I - Initialization "
70 SELECT O L Parallel Port Select PHOB8, 8 mA
71 Vddp Vdd - 5V
72 PERROR O L Paper Error PHOB8, 8 mA
73 BUSY O " Parallel Port Busy PHOB8, 8 mA
74 nACK O H Parallel Port Acknowledge PHOB8, 8 mA
75 Vssp Vss - 5VGnd
76 PD0 I/O Input Parallel Port Data 0 PHBTT8, 8 mA
77 PD1 I/O " Parallel Port Data "
78 Vddi Vcca - 3.3 V for Ring OSC
79 PD2 I/O Input Parallel Port Data PHBTT8, 8 mA
80 PD3 I/O " Parallel Port Data "
81 Vssi Vssa - 3.3 V Gnd for Ring OSC
82 PD4 I/O Input Parallel Port Data PHBTT8, 8 mA
83 PD5 I/O " Parallel Port Data "
84 Vddo Vdd - 5V
85 PD6 I/O Input Parallel Port Data PHBTT8, 8 mA
86 PD7 I/O " Parallel Port Data "
87 nSTROBE I - Data Strobe PHIL, ST
88 Vsso Vss - 5VGnd
89 RxD1 / CTin[2] I - Uart 1 Rx Data PHIL, ST
90 TxD1 O H Uart 1 Tx Data PHOB4, 4 mA