SB710 datasheet(39/88 Pages) AMD

39 / 88 page

45215

Rev. 1.60 November 09

AMD SB710 Databook

Signal Description

SDA3/IMC_GPIO14

I/OD

0.8-V threshold,

S5_3.3V domain

SMBus Data 3/IMC GPIO14

Note: Pin type is I/O when the pin is configured as

GPIO.

SMBALERT#/

THRMTRIP#/

GEVENT2#

I/O

S5_3.3V

SMBus Alert# / Thermal Trip / General Event 2

SM Bus Alert: This signal is used to wake the system

or generate an SMI#. If not used for SMBALERT#, it

can be used for thermal trip or as a GEVENT.

Notes: (1) SDA1 And SCL1 SMBus interface is dedicated for ASF devices only. It should not be used to connect

to any other devices.

(2) There are only two SMBus controllers. The SCL1/SDA1 pair is controlled by SMBus controller 1.

SCL0/SDA0, SCL2/SDA2, and SCL3/SDA3 are multiplexed pins that are all controlled by SMBus controller

0, and only 1 pair of those pins can be active at any time.

7.14

External Event / General Event / General Power Management /

General Purpose Open Collector

The EXTEVENT/GEVENT/GPM/GPOC pins of the SB710 are multiplexed with other functions. For

information on how to configure the EXTEVENT/GEVENT/GPM/ GPOC pins for the desired functions,

see the AMD SB700/SB710/SB750 Register Reference Guide.

The table below lists all the EXTEVENT/GEVENT/GPM/GPOC pins on the SB710. The Default Type

column shows the state of the pin (default function) after de-assertion of the PCI host bus reset

(A_RST#), which happens after power up or after system reset. Signals that are in input state after reset

will be tri-state (TS) if they do not have any internal PU (pull-up) or PD (pull-down). For pins that have PU

or PD internally, their states after reset will depend on the PU or PD: for signals with PU, the state will be

HIGH and for signals with PD the state will be LOW. The PU and PD shown are enabled by default after

PCI Reset and can be disabled by System BIOS.

Abbreviations: PU = pull-up, PD = pull-down, OD = open drain, I/O = Input/Output, TS = tri-state

Ball Name

(Default Function

in Blue)

Type

Voltage and

Domain

Internal

Resistor

(Default in

Blue)

Default

Type

(Default

State in

Blue)

Functional Description

USB_OC0#/

GPM0#

I/O

3.3V_S5

10-kΩ PU

10-kΩ PD

Input

USB Over Current 0/

GPM 0

USB_OC1#/

GPM1#

I/O

3.3V_S5

10-kΩ PU

10-kΩ PD

Input

USB Over Current 1/

GPM 1

USB_OC2#/

GPM2#

I/O

3.3V_S5

10-kΩ PU

10-kΩ PD

Input

USB Over Current 2/

GPM 2

USB_OC3#/

IR_RX1/

GPM3#

I/O

3.3V_S5

10-kΩ PU

10-kΩ PD

Input

USB Over Current 3/

Infrared Receive 1/

GPM 3

USB_OC4#/

IR_RX0/

GPM4#

I/O

3.3V_S5

10-kΩ PU

10-kΩ PD

Input

USB Over Current 4/ Infrared

Receive 0/

GPM 4

USB_OC5#/

IR_TX0/

GPM5#

I/O/

3.3V_S5

10-kΩ PU

10-kΩ PD

Input

USB Over Current 5/

Infrared Transmit 0/

GPM 5

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