Adlink Express-CVC Bedienungsanleitung PDF herunterladen (Seite 22)

Page 22 Express-CVC

3.3.10. SPI (BIOS only)

Signal Pin Description I/O PU/PD Comment

SPI_CS# B97 Chip select for Carrier Board SPI BIOS Flash. O 3.3VSB

SPI_MISO A92 Data in to module from carrier board SPI BIOS flash. I 3.3VSB

SPI_MOSI A95 Data out from module to carrier board SPI BIOS flash. O 3.3VSB

SPI_CLK A94 Clock from module to carrier board SPI BIOS flash. O 3.3VSB

SPI_POWER A91 Power supply for Carrier Board SPI – sourced from Module

– nominally 3.3V.

The Module shall provide a minimum of 100mA on

SPI_POWER.

Carriers shall use less than 100mA of SPI_POWER.

SPI_POWER shall only be used to power SPI devices on

the Carrier

O P 3.3VSB

BIOS_DIS0# A34 Selection strap to determine the BIOS boot device. I PU 10K 3.3V Carrier shall pull to GND

or leave not connected

BIOS_DIS1# B88 Selection strap to determine the BIOS boot device. I PU 10K 3.3V Carrier shall pull to GND

or leave not connected

3.3.11. Miscellaneous

Signal Pin Description I/O PU/PD Comment

SPKR B32 Output for audio enunciator, the “speaker” in PC-AT

systems

O 3.3V

WDT B27 Output indicating that a watchdog time-out event has

occurred.

O 3.3V

KBD_RST# A86 Input to module from (optional) external keyboard

controller that can force a reset. Pulled high on the

module. This is a legacy artifact of the PC-AT.

I 3.3V PU 10K 3.3V

KBD_A20GATE A87 Input to module from (optional) external keyboard

controller that can be used to control the CPU A20 gate

line. The A20GATE restricts the memory access to the

bottom megabyte and is a legacy artifact of the PC-AT.

Pulled low on the module.

I 3.3V PU 10K 3.3V

THRM# B35 Input from off-module temp sensor indicating an over-temp

situation.

I 3.3V

THERMTRIP# A35 Active low output indicating that the CPU has entered

thermal shutdown.

O 3.3V

TPM_PP11

C83 Trusted Platform Module (TPM) Physical Presence pin.

Active high. TPM chip has an internal pull down. This

signal is used to indicate Physical Presence to the TPM.

I 3.3V PD 3.3V If TPM not installed on

module than remove PD

3.3V

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