Copyright © 2021 congatec GmbH
SA70m01
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Table 14.1
Optional eDP Signal Description
Signals
Pins
Description
I/O
PU/PD Comments
e
eDP0_TX0-
S125
S126
eDP0 primary differential data pair 0
O LVDS
DP
Not supported by default. AC
coupling required off-module
e
eDP0_TX1-
S128
S129
eDP0 primary differential data pair 1
O LVDS
DP
e
eDP0_TX2-
S131
S132
eDP0 primary differential data pair 2
O LVDS
DP
e
eDP0_TX3-
S137
S138
eDP0 primary differential data pair 3
O LVDS
DP
e
eDP0_AUX-
S134
S135
eDP0 primary auxiliary differential pair for link management and device control
O LVDS
DP
LCD0_VDD_EN
S133
Primary panel power enable. High enables panel VDD
O 1.8V
LCD0_BKLT_EN
S127
Primary backlight enable. High enables panel backlight
O 1.8V
LCD0_BKLT_PWM S141
Primary backlight brightness control via pulse width modulation (PWM)
O 1.8V
eDP0_HPD
S144
eDP0 Hot Plug Detect pins for primary eDP display
I 1.8V
PD 100k
100k PD present only on variants
with eDP support
e
eDP1_TX0-
S111
S112
eDP1 secondary differential data pair 0
O LVDS
DP
Not supported
e
eDP1_TX1-
S114
S115
eDP1 secondary differential data pair 1
O LVDS
DP
e
eDP1_TX2-
S117
S118
eDP1 secondary differential data pair 2
O LVDS
DP
e
eDP1_TX3-
S120
S121
eDP1 secondary differential data pair 3
O LVDS
DP
e
eDP1_AUX-
S108
S109
eDP1 secondary auxiliary differential pair for link management and device
control
O LVDS
DP
LCD1_VDD_EN
S116
Secondary panel power enable. High enables panel VDD
O 1.8V
Not connected
LCD1_BKLT_EN
S107
Secondary panel backlight enable. High enables panel backlight
O 1.8V
LCD1_BKLT_PWM S122
Secondary panel backlight brightness control via pulse width modulation (PWM) O 1.8V
eDP1_HPD
S113
eDP1 Hot Plug Detect pins
I 1.8V
I2C_LCD_DAT
S140
I2C data to read LCD display EDID EEPROMs. Possible EDID EEPROM address
conflicts may occur if multiple displays are implemented
I/O OD
1.8V
PU 1k3
Optional - eDP panel information is
usually via the eDP auxiliary pair
I2C_LCD_CK
S139
I2C clock to read LCD display EDID EEPROMs
O 1.8V
PU 1k3
Optional - eDP panel information is
usually via the eDP auxiliary pair