Technical information

Technical Information • SCS-TRUMPET • CPU Expansion Side Card

EXP

The inter-board connector EXP is mounted on bottom of the SCS-TRUMPET PCB. This allows to attach

the SCS-TRUMPET mezzanine companion card on top of the CPU carrier board. A suitable board

stacker is used in addition to bridge the gap between the two boards (exactly 4HP distance between

PCBs). EXP is used to pass the Low Pin Count I/F to the SCS-TRUMPET, besides two USB channels and

some sideband signals.

EXP • Expansion Board Interface (LPC/HD-Audio/USB)

1.27mm Socket 2 x 20 (276.53.040.01)

pin orientation shows

CPU carrier board top view

GND 1 2 +3.3V_CR

CLK_33MHZ 3 4 PLTRST#

LPC_AD0 5 6 LPC_AD1

LPC_AD2 7 8 LPC_AD3

LPC_FRAME# 9 10 LPC_DRQ#

GND 11 12 +3.3V_CR

SERIRQ 13 14 PME#

SMI# 15 16 CLK_14MHZ

FWH_ID0 17 18 FWH_INIT#

KBD_RST# 19 20 A20GATE

GND 21 22 +5V_CR

USB2_DN 23 24 USB1_DN

USB2_DP 25 26 USB1_DP

USB_OC# 27 28 DBRESET#

SMB_CLK 29 30 SMB_DAT

GND 31 32 +5V_CR

HDA_SDOUT 33 34 HDA_SDIN0

HDA_RST# 35 36 HDA_SYNC

HDA_BITCLK 37 38 HDA_SDIN1

SPEAKER 39 40 +12V_A

switched power supply lines from CPU carrier board according to Sx state

1.27mm

Socket

EKF 276.53.040.01 ekf.co