KTD-N0882-I
Page 53
Internal Connectors
KTQ87/KTH81 Users Guide
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
Signal
PIN
Signal
Type Ioh/Iol Pull U/D Note
1
-
CLK
1 2
SB3V3
PWR
-
-
-
I
CS0#
3 4
ADDIN
IO
/10K
10K/
-
NC
5 6
NC
-
-
-
10K/
IO
MOSI
7 8
ISOLATE#
IO
100K
-
IO
MISO
9 10
GND
PWR
-
-
1K
IO SPI_IO2_#WP
11 12
SPI_IO3_#HOLD IO
1K
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.
Signal
Description
CLK
Serial Clock
SB3V3
3.3V Standby Voltage power line. Normally output power, but when Motherboard is
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.
ISOLATE#
The ISOLATE# input, active low, is normally NC, but must be connected to GND when
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_IO2_#WP
SPI Data I/O: A bidirectional signal used to support Dual IO Fast Read, Quad IO Fast Read
and Quad Output Fast Read modes. The signal is not used in Dual Output Fast Read mode.
SPI_IO3_#HOLD SPI Data I/O: A bidirectional signal used to support Dual IO Fast Read, Quad IO Fast Read
and Quad Output Fast Read modes. The signal is not used in Dual Output Fast Read mode.
Note Pull
U/D
Ioh/Iol Type
Signal
PIN
Signal
Type Ioh/Iol Pull
U/D
Note
-
-
PWR
LPC CLK
1 2
GND
-
-
PWR LPC FRAME#
3
KEY
LPC RST#
5 6
+5V
LPC AD3
7 8
LPC AD2
+3V3
9 10
LPC AD1
LPC AD0
11 12
GND
SMB_CLK
13 14
SMB_DATA
SB3V3
15 16
LPC SERIRQ
GND
17 18
CLKRUN#
SUS_STAT#
19 20
TPM_DRQ#0
