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# Pin Assignments for I/O Connectors

Dell™ Latitude™ C400 Service Manual

| Serial Connector |  | USB Connector
| Docking Connector |  | IDE Module Bay Connector
| Video Connector |  |

Serial Connector

Pin | Signal
--- | ---
1 | DCD
2 | RXDA
3 | TXDA
4 | DTR
5 | GND
6 | DSR
7 | RTS
8 | CTS
9 | RI

Docking Connector

Pin | Signal
--- | ---
1 | STRB#/5V
2 | PD0
3 | PD1
4 | PD2
5 | PD3
6 | PD4
7 | PD5
8 | PD6
9 | PD7
10 | GND
11 | DOCK_SPKR
12 | DOCK_MIC
13 | DOCK_LINE
14 | DOCK_CDROM
15 | GND
16 | NC
17 | POWER_SW#
18 | QPCIEN#
19 | S1.6M_EN#
20 | DFDD/LPT#
21 | GND
22 | NC
23 | NC
24 | D_ACTLED
25 | D_PWRLED
26 | DOCK_PWR_SRC
27 | DOCK_PWR_SRC
28 | DOCK_PWR_SRC
29 | GND
30 | +5VDOCK
31 | +5VDOCK
32 | +5VDOCK
33 | +5VDOCK
34 | +5VDOCK
35 | GND
36 | DOCK_PWR_SRC
37 | DOCK_PWR_SRC
38 | DOCK_PWR_SRC
39 | DOCK_PWR_SRC
40 | GND
41 | DOCK_+DC_IN
42 | DOCK_+DC_IN
43 | DOCK_+DC_IN
44 | DOCK_+DC_IN
45 | DOCK_+DC_IN
46 | DOCK_+DC_IN
47 | DOCK_+DC_IN
48 | DOCK_+DC_IN
49 | GND
50 | LOW_PWR

Pin | Signal
--- | ---
51 | HSYNC
52 | VSYNC
53 | GND
54 | DOCKED
55 | USB_VD1+
56 | USB_VD1-
57 | GND
58 | USB_VD2+
59 | USB_VD2-
60 | DOCKOC1#
61 | RUN_ON#
62 | GND
63 | NC
64 | DOCK_SCLK
65 | DOCK_LRCK
66 | DOCK_MCLK
67 | GND
68 | +12V
69 | AFD#
70 | ERROR#
71 | ACK#
72 | GND
73 | INIT#
74 | SLCT_IN#
75 | BUSY
76 | PE
77 | SLCT
78 | GND
79 | DAT_SMB
80 | DCLK_SMB
81 | SMB_INIT#
82 | GND
83 | DAT_DOCKSM1
84 | CLK_DOCKSM1
85 | DAT_DOCKKBD
86 | CLK_DOCKKBD
87 | GND
88 | RI0
89 | CTS0
90 | RTS0
91 | DSR0
92 | GND
93 | DTR0
94 | TXD0#
95 | RXD0#
96 | DCD0
97 | NC
98 | +5VSUS
99 | NC
100 | NC

Pin | Signal
--- | ---
101 | VGA_GRN
102 | GND
103 | VGA_RED
104 | GND
105 | VGA_BLU
106 | DOCK_SD/MODE
107 | D_IRTX
108 | D_IRRX
109 | GND
110 | SPIRQB#
111 | SPIRQC#
112 | DAT_DDC2
113 | CLK_DDC2
114 | SPAR
115 | SPME#
116 | GND
117 | SSERR#
118 | SPERR#
119 | SLOCK#
120 | SSTOP#
121 | GND
122 | SDEVSEL#
123 | STRDY#
124 | SIRDY#
125 | SFRAME#
126 | SCLKRUN#
127 | GND
128 | SGNTA#
129 | SREQA#
130 | SGNT0#
131 | SREQ0#
132 | SPCIRST#
133 | SH1SEL#
134 | GND
135 | SWRPRT#
136 | SDSKCHG#/DRQ
137 | SDIR#
138 | STRK0#
139 | SSTEP#
140 | SDRV1#
141 | GND
142 | SMTR1#
143 | SWRDATA#
144 | SWGATE#
145 | SRDATA#
146 | SINDEX#
147 | GND
148 | NC
149 | +5VALW
150 | NC

Pin | Signal
--- | ---
151 | GND
152 | CLK_SPCI
153 | GND
154 | SAD0
155 | SAD1
156 | SAD2
157 | SAD3
158 | SAD4
159 | SAD5
160 | SAD6
161 | GND
162 | SAD7
163 | SAD8
164 | SC/BE0#
165 | SAD9
166 | SAD10
167 | SAD11
168 | SAD12
169 | GND
170 | SAD13
171 | SAD14
172 | SAD15
173 | SAD16
174 | SC/BE1#
175 | CD/BE2#
176 | GND
177 | SAD17
178 | SAD18
179 | SAD19
180 | SAD20
181 | SAD21
182 | GND
183 | SAD22
184 | SAD23
185 | SAD24
186 | SC/BE3#
187 | SAD25
188 | GND
189 | SAD26
190 | SAD27
191 | SAD28
192 | SAD29
193 | SAD30
194 | SAD31
195 | GND
196 | NC
197 | NC
198 | NC
199 | NC
200 | GND

Video Connector

Pin | Signal
1 | RED
2 | GREEN
3 | BLUE
4 | NC
5 | GND
6 | GND
7 | GND
8 | GND

Pin | Signal
9 | CRT_VCC
10 | GND
11 | NC
12 | DAT_DDC2
13 | HSYNC
14 | VSYNC
15 | CLK_DDC2

USB Connector

Pin | Signal
--- | ---
1 | VCC
2 | –DATA
3 | +DATA
4 | GROUND

IDE Module Bay Connector

Pin | Signal
--- | ---
1 | BAY_MODPRES#
2 | HDSEL#
3 | RDATA#
4 | WRPRT#
5 | WRDATA#
6 | INDEX#
7 | DSKCHG#
8 | 1D6M_EN#
9 | SIDE_IOW#
10 | SIDED15
11 | SIDED12
12 | SIDED9
13 | SIDE_CS3#
14 | SIDE_CS1#
15 | +5VMOD
16 | IRQ15
17 | +5VMOD
18 | SIDED0
19 | +5VMOD
20 | SIDED3
21 | +5VMOD
22 | SIDED6
23 | +5VMOD
24 | SIDE_A2
25 | +5VMOD
26 | SIDE_DACK#
27 | +5VMOD
28 | SIDE_IOR#
29 | +5VMOD
30 | SIDED14
31 | +5VMOD
32 | SIDED11
33 | +5VMOD
34 | MOD_CD_R

Pin | Signal
--- | ---
35 | WGATE#
36 | GND
37 | MTR0#
38 | STEP#
39 | DRV0#
40 | GND
41 | DIR#
42 | TRKO#
43 | BAY_CD_FDD#
44 | GND
45 | SIDED1
46 | SIDED4
47 | SIDED7
48 | GND
49 | SIDEIORDY
50 | GND
51 | SIDE_DREQ
52 | GND
53 | SIDED13
54 | SIDED10
55 | IDE_RST_MOD_5V#
56 | GND
57 | SIDEACT#
58 | SIDE_A1
59 | SIDE_A0
60 | GND
61 | SIDE_CSEL_SEC#
62 | SIDED2
63 | SIDED5
64 | GND
65 | SIDED8
66 | MOD_CL_L
67 | CDGND
68 | BAY_MODPRES#

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