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Chapter 4: Motherboard Connections
Software-Defined Pins (SDP)
JSDP1, JSDP2, and JSDP3 are software-defined pins that can be used to support IEEE
1588 auxiliary devices and other hardware or software-control purposes. These pins can be
configured to function as standard inputs or General-Purpose Interrupt (GPI) input or output
pins. In order for pins to function as GPI, they must be configured as inputs and enabled by
the PCH Ethernet or I350.
SGPIO Header
Pin Definitions
Pin#
Definition
Pin#
Definition
1
NC
2
NC
3
Ground
4
DATA Out
5
Load
6
Ground
7
Clock
8
NC
S-SGPIO Header
The Serial Link General Purpose Input/Output (S-SGPIO1) header is used to communicate
with the enclosure management chip on the back panel.
Nano SIM Slot
The JSIM1 slot supports a Nano SIM card.
LAN Port Activity LED
JLANLED1 is the activity LED for LAN1, JLANLED2 is the activity LED for LAN2 - LAN5, and
JLANLED3 is the activity LED for LAN6 - LAN9.
JTGLED1, JTGLED2
JTGLED1 is the activity LED for LAN10 - LAN11, and JTGLED2 is the activity LED for LAN12
- LAN13.