Nortel-networks Circuit Card Manual de usuario Pagina 191

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NT4N39AA CP Pentium IV Card Page 191 of 906
Circuit Card Description and Installation
ITP connector (25 PIN, Debug Only)
Post 80 Debug LEDs (Optional)
CP PIV has post 80 debug LEDs to assist in debugging the board and solving
boot related problems. Using a GPCS from Super I/O X-bus, data lines are
latched using latch 74F374. These help identify Post 80 codes. This feature is
available only in debug boards.
Figure 28
ITP connector pin outs
Pin Signal Name Pin Signal Name
P1 GND P2 GND
P3 BPM0N P4 NC
P5 BPM1N P6 RESETN
P7 BPM2N P8 GND
P9 BPM3N P10 TDI
P11 BPM4N P12 TMS
P13 BPM5N P14 TRSTN
P15 ITP_CPURSTN P16 TCK
P17 TCK P18 NC
P19 CLK P20 GND
P21 CLKN P22 PWR
P23 BPM5N P24 TDO
P25 GND
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