Copyright
©
2018
congatec
AG
TR44m17
43/65
Table 14
LPC Signal Descriptions
Signal
Pin # Description
I/O
PU/PD
Comment
LPC_AD[0:3]
B4-B7 LPC Mode: LPC multiplexed address, command and data bus
I/O 3.3V
LPC_FRAME#
B3
LPC Mode: LPC Frame indicates the start of a LPC cycle.
O 3.3V
LPC_CLK
B10
LPC Mode: LPC clock output, 33MHz
O 3.3V
LPC_DRQ0#
B8
LPC Mode: LPC serial DMA request
I 3.3V
PU 10K 3.3V
LPC_DRQ1#
B8
LPC Mode: LPC serial DMA request
I 3.3V
Not supported
LPC_SERIRQ
A50
LPC Mode: LPC serial interrupt
I/O OD 3.3V
PU 10K 3.3V
SUS_STAT#
B18
LPC Mode: SUS_STAT# indicates imminent suspend operation. It is used to notify LPC
devices that a low power state will be entered soon. LPC devices may need to
preserve memory or isolate outputs during the low power state.
O 3.3V
ESPI_EN#
B47
This signal is used by the Carrier to indicate the operating mode of the LPC/eSPI bus.
If left unconnected on the carrier, LPC mode (default) is selected. If pulled to GND on
the carrier, eSPI mode is selected. This signal is pulled to a logic high on the module
through a resistor. The Carrier should only float this line or pull it low.
I 3.3V
BIOS_DIS0
A34
Selection strap to determine the BIOS boot device. The Carrier should only float
these or pull them low. Refer to table 4.13 of the COM Express Module Base
Specification for strapping options of BIOS disable signals.
I
BIOS_DIS1
B88
I
Table 15
Serial ATA Signal Descriptions
Signal
Pin # Description
I/O
PU/PD
Comment
S
SATA0_RX-
A19
A20
Serial ATA channel 0, Receive Input differential pair.
I SATA
Supports Serial ATA specification, Revision 3.0.
Only two SATA ports can be set to active via BIOS setup.
S
SATA0_TX-
A16
A17
Serial ATA channel 0, Transmit Output differential pair.
O SATA
Supports Serial ATA specification, Revision 3.0.
Only two SATA ports can be set to active via BIOS setup.
S
SATA1_RX-
B19
B20
Serial ATA channel 1, Receive Input differential pair.
I SATA
Supports Serial ATA specification, Revision 3.0.
Only two SATA ports can be set to active via BIOS setup.
S
SATA1_TX-
B16
B17
Serial ATA channel 1, Transmit Output differential pair.
O SATA
Supports Serial ATA specification, Revision 3.0.
Only two SATA ports can be set to active via BIOS setup.
S
SATA2_RX-
A25
A26
Serial ATA channel 2, Receive Input differential pair.
I SATA
Supports Serial ATA specification, Revision 3.0.
Only two SATA ports can be set to active via BIOS setup.
S
SATA2_TX-
A22
A23
Serial ATA channel 2, Transmit Output differential pair.
O SATA
Supports Serial ATA specification, Revision 3.0.
Only two SATA ports can be set to active via BIOS setup.
S
SATA3_RX-
B25
B26
Serial ATA channel 3, Receive Input differential pair.
I SATA
Supports Serial ATA specification, Revision 3.0.
Only two SATA ports can be set to active via BIOS setup.
S
SATA3_TX-
B22
B23
Serial ATA channel 3, Transmit Output differential pair.
O SATA
Supports Serial ATA specification, Revision 3.0.
Only two SATA ports can be set to active via BIOS setup.
(S)ATA_ACT#
A28
ATA (parallel and serial) or SAS activity indicator, active low.
O 3.3V
Table 16
USB 2.0 Signal Descriptions
