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TA30m16
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8.2
Boot Strap Signals
Table 35 Boot Strap Signal Descriptions
Signal
Pin # Description of Boot Strap Signal
I/O
PU/PD Comment
DDI1_CTRLDATA_AUX-
DP1_AUX-
HDMI_CTRLDATA
D16
Multiplexed with DP1_AUX- and HDMI1_CTRLDATA.
DP AUX- function if DDI1_DDC_AUX_SEL is no connect.
HDMI/DVI I2C CTRLDATA if DDI1_DDC_AUX_SEL is pulled high.
I/O PCIE
I/O OD 3.3V
PU100k
3.3V
DDI1_CTRLDATA_AUX- is a boot strap
signal (see caution statement below).
DDI2_CTRLDATA_AUX-
DP2_AUX-
HDM2_CTRLDATA
C33
Multiplexed with DP2_AUX- and HDMI2_CTRLDATA.
DP AUX- function if DDI2_DDC_AUX_SEL is no connect.
HDMI/DVI I2C CTRLDATA if DDI2_DDC_AUX_SEL is pulled high.
I/O PCIE
I/O OD 3.3V
PU100k
3.3V
DDI2_CTRLDATA_AUX- is a boot strap
signal (see caution statement below).
Caution
1. The signals listed in the table above are used as chipset configuration straps during system reset. In this condition (during reset), they are
inputs that are pulled to the correct state by either COM Express™ internally implemented resistors or chipset internally implemented
resistors that are located on the module.
2. No external DC loads or external pull-up or pull-down resistors should change the configuration of the signals listed in the above table.
External resistors may override the internal strap states and cause the COM Express™ module to malfunction and/or cause irreparable
damage to the module.
