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Chapter 4: Motherboard Connections
HFI Debug Port for Fabric CPU (JTAG_HFI1)
This connector (JTAG_HFI1) is the JTAG port and provides miscellaneous signals connectivity
requirements of the Fabric CPU debug port. Refer to the table below for pin definitions.
HFI Debug Port for Fabric CPU
Pin Definitions
Pin#
Definition
Pin#
Definition
1
CD_TCK
2
Ground
3
CD_TDO
4
VCCH
5
CD_TMS
6
CD_TRST_N
7
CPU_PWRGD
8
NC
9
CD_TDI
10
Ground
Figure 4-1. JF1: Control Panel Pins
Control Panel
JF1 contains header pins for various control panel connections. See the figure below for the
pin locations and definitions of the control panel buttons and LED indicators.
All JF1 wires have been bundled into a single cable to simplify this connection. Make sure
the red wire plugs into pin 1 as marked on the motherboard. The other end connects to the
control panel PCB board.
Power Button
OH/Fan Fail LED
1
Reset Button
2
Power Fail LED
HDD LED
FP PWRLED
Reset
PWR
UID LED
Ground
Ground
19
20
3.3V
X
Ground
NMI
X
Vcc
Vcc
X
X
NIC2 Activity LED
NIC1 Activity LED