X221, -LC, -AI
TECHNICAL REFERENCE MANUAL
VERSION: 1.4
Page 18 of 38
65 GND
66 UPHY_RX5_N
C18
67 UPHY_TX0_N
J23
Standard is PCIEx1, optional USB3.0, contact Auvidea
68 UPHY_RX_P
C19
69 UPHY_TX0_P
J22
Standard is PCIEx1, optional USB3.0, contact Auvidea
70 GND
71 GND
72 D2_N
73 UPHY RX4_N
A19
74 D2_P
75 UPHY_RX4_P
A18
76 NC
77 GND
78 NC
79 GPIO_EXP0_INT
connected to J28 pin 74
80 NC
5.16
J21 - POWER BUTTON
5.17
J22 - ETHERNET
Standard pinout.
5.18
J23 - I2S/I2C
JST-GH 1.25mm
Pin
Description
Socket pin
Note
1
3.3V
2
I2S3_DIN
J59
1.8V
3
I2S3_DOUT
K59
1.8V
4
I2S3_FS
C60
1.8V
5
I2S3_SCLK
C59
1.8V
6
I2C_SCL_GP5_3.3
A53
3.3V, also connected to J28 (93)
7
I2C_SDA_GP5_3.3
C53
3.3V, also connected to J28 (95)
8
GND
GND
5.19
J25 - FORCE RECOVERY BUTTON
5.20
J26 - RESET BUTTON