Table 56. Server Monitor Module Connector Pin Out (continued)

Pin

Signal

Type*

Description—SKA4 Implementation

9

NMI

out

Non-maskable interrupt: not supported on SMM

10

HOST_AUX

out

Baseboard voltage monitored by SMM card: connected to 3.3 V

11

RESET_L

in

Baseboard reset signal from Server Monitor Module

12

GROUND

ground

Ground

13

GROUND

ground

Ground

14

Key

 

No connect on baseboard

15

SECURE_MODE

out

Secure mode indication: not supported on SMM

16

GROUND

ground

Ground

17

CHASSIS_INTRUSION

out

Chassis intrusion indication: not supported on SMM

18

Reserved

 

Reserved pin: NC on baseboard

19

Reserved

 

Reserved pin: NC on baseboard

20

GROUND

ground

Ground

21

Reserved

 

Reserved pin: NC on baseboard

22

Reserved

 

Reserved pin: NC on baseboard

23

Reserved

 

Reserved pin: NC on baseboard

24

Reserved

 

Reserved pin: NC on baseboard

25

key

 

No connect on baseboard

26

Reserved

 

Reserved pin: NC on baseboard

*Type (in/out) is from the perspective of the baseboard.

SM Bus Connector (J9E4)

This connector allows connection to the Memory Module I2C bus that the DIMMs EEPROMs reside on. A shorted I2C connection at the SM Bus I2C connector will prevent the system BIOS from sizing and configuring main memory.

Table 57. SM Bus Connector (J9E4)

Pin

Signal

Description

1

Local I2C SDA

OSB4 SM Bus Data Line

2

GROUND

 

3

Local I2C SCL

OSB4 SM Bus Clock Line

104

SKA4 Baseboard Product Guide