KX-TDE620BX (serv.man2) - Panasonic PBX Service Manual (repair manual). Page 79

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79
     KX-TDE620BX
Note
3s.O: 3State Output
199
BSTio15
I/O
Backplane Serial Input/Output Streams 15(Unused)
200
BSTio14
I/O
Backplane Serial Input/Output Streams 14(Unused)
201
BSTio13
I/O
Backplane Serial Input/Output Streams 13(Unused)
202
BSTio12
I/O
Backplane Serial Input/Output Streams 12(Unused)
203
VSS
Ground
204
VDD
+3.3 Volt Power Supply.
205
NC
This pin must be left unconnected for normal operation.
206
NC
This pin must be left unconnected for normal operation.
207
BSTio11
I/O
Backplane Serial Input/Output Streams 11(Unused)
208
BSTio10
I/O
Backplane Serial Input/Output Streams 10(Unused)
209
BSTio9
I/O
Backplane Serial Input/Output Streams 9(Unused)
210
BSTio8
I/O
Backplane Serial Input/Output Streams 8(Unused)
211
VSS
Ground
212
VDD
+3.3 Volt Power Supply.
213
NC
This pin must be left unconnected for normal operation.
214
NC
This pin must be left unconnected for normal operation.
215
BSTio7
I/O
Backplane CT_D[7] Input/Output Streams 7
216
BSTio6
I/O
Backplane CT_D[6] Input/Output Streams 6
217
BSTio5
I/O
Backplane CT_D[5] Input/Output Streams 5
218
BSTio4
I/O
Backplane CT_D[4] Input/Output Streams 4
219
VSS
Ground
220
VDD
+3.3 Volt Power Supply.
221
NC
This pin must be left unconnected for normal operation.
222
NC
This pin must be left unconnected for normal operation.
223
BSTio3
I/O
Backplane CT_D[3] Input/Output Streams 3
224
BSTio2
I/O
Backplane CT_D[2] Input/Output Streams 2
225
BSTio1
I/O
Backplane CT_D[1] Input/Output Streams 1
226
BSTio0
I/O
Backplane CT_D[0] Input/Output Streams 0
227
NC
This pin must be left unconnected for normal operation.
228
NC
This pin must be left unconnected for normal operation.
229
VDD5V
+5.0 V/+3.3 V Power Supply.
230
VSS
Ground
231
VDD
+3.3 Volt Power Supply.
232
NC
This pin must be left unconnected for normal operation.
233
nDTA
O
Data Transfer Acknowledge
234
D15
I/O
Data Bus 15
235
D14
I/O
Data Bus 14
236
D13
I/O
Data Bus 13
237
D12
I/O
Data Bus 12
238
D11
I/O
Data Bus 11
239
D10
I/O
Data Bus 10
240
D9
I/O
Data Bus 9
241
D8
I/O
Data Bus 8
242
VSS
Ground
243
VDD
+3.3 Volt Power Supply.
244
D7
I/O
Data Bus 7
245
D6
I/O
Data Bus 6
246
D5
I/O
Data Bus 5
247
D4
I/O
Data Bus 4
248
D3
I/O
Data Bus 3
249
D2
I/O
Data Bus 2
250
D1
I/O
Data Bus 1
251
D0
I/O
Data Bus 0
252
VSS
Ground
253
VDD
+3.3 Volt Power Supply.
254
nCS
I
Chip Select 
255
nDS
I
Data Strobe 
256
R/nW
I
Read/Write 
Pin No.
Pin Name
I/O
   Discription Pin Usage
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