Spi Connector (Spi_Head); Lpc Connector (J30) - Kontron KTH81/mITX User Manual

KTD-N0882-I

7.14 SPI Connector (SPI_HEAD)

The SPI Connector is normally not used. If however a SPI BIOS is connected via the SPI Connector then the
board will attempt to boot from it.
Note Pull U/D Ioh/Iol Type
1 -
-
10K/
10K/
-
1K
Signal Description
CLK Serial Clock
3.3V Standby Voltage power line. Normally output power, but when Motherboard is
SB3V3
turned off then the on-board SPI Flash can be 3.3V power sourced via this pin.
CS0# CS0# Chip Select 0, active low.
ADDIN ADDIN input signal must be NC.
MOSI Master Output, Slave Input.
The ISOLATE# input, active low, is normally NC, but must be connected to GND when
ISOLATE# programming the SPI flash. Power Supply to the Motherboard must be turned off when
loading SPI flash. The pull up resistor is connected via diode to 5VSB.
MISO Master Input, Slave Output
SPI Data I/O: A bidirectional signal used to support Dual IO Fast Read, Quad IO Fast Read
SPI_IO2_#WP
and Quad Output Fast Read modes. The signal is not used in Dual Output Fast Read mode.
SPI Data I/O: A bidirectional signal used to support Dual IO Fast Read, Quad IO Fast Read
SPI_IO3_#HOLD
and Quad Output Fast Read modes. The signal is not used in Dual Output Fast Read mode.

7.15 LPC Connector (J30)

The LPC connector (Flex board only) is in general unsupported. Only under special circumstances may the
LPC interface be of interest.
Pull
Note Ioh/Iol Type
U/D
- -
- -
Page 53
Signal PIN
CLK 1 2
I CS0# 3 4
- NC 5 6
IO MOSI 7 8
IO MISO 9 10
IO SPI_IO2_#WP 11 12
Signal PIN
PWR LPC CLK 1
PWR LPC FRAME# 3
LPC RST# 5
LPC AD3 7
+3V3 9 10
LPC AD0 11 12
SMB_CLK 13 14
SB3V3 15 16
GND 17 18
SUS_STAT# 19 20
KTQ87/KTH81 Users Guide
Signal Type Ioh/Iol Pull U/D Note
SB3V3 PWR
ADDIN IO
NC -
ISOLATE# IO
GND PWR
SPI_IO3_#HOLD IO
Signal Type Ioh/Iol
2 GND
KEY
6 +5V
8 LPC AD2
LPC AD1
GND
SMB_DATA
LPC SERIRQ
CLKRUN#
TPM_DRQ#0
Internal Connectors
- -
/10K
- -
100K
- -
1K
Pull
Note
U/D