Reference Manual

Hardware Reference Manual
Version 1.0 - 27 - eInfochips Confidential
SBC Pin
No.
I/O Card
Pin No.
Signal Name
Default Pin Function
Voltage
Level
J18.1
J17.1
GND
Ground
-
J18.2
J17.2
VREG_L13A
PM660 Linear regulator L13
output
1.8V
J18.3
J17.3
CDC_HS_DET_PMIC_CONN
Headset detection
-
J18.4
J17.4
GND
Ground
-
J18.5
J17.5
CDC_HPH_L_PMIC_CONN
Headphone output, left channel
-
J18.6
J17.6
GND
Ground
-
J18.7
J17.7
CDC_HPH_R_PMIC_CONN
Headphone output, right channel
-
J18.8
J17.8
CDC_IN3_P_PMIC
Earpiece output, plus (+)
-
J18.9
J17.9
GND
Ground
-
J18.10
J17.10
CDC_EAR_M_PMIC
Earpiece output, minus (-)
-
J18.11
J17.11
CDC_MIC2_P_PMIC_CONN
Microphone input 2
-
J18.12
J17.12
GND
Ground
-
J18.13
J17.13
CDC_HPH_REF_PMIC_CONN
Headphone ground reference
-
J18.14
J17.14
WCD_SDM_MCLK
Audio codec PDM clock signal and
codec master clock/ LPI bit 18
1.8V
J18.15
J17.15
GND
Ground
-
J18.16
J17.16
GND
Ground
-
J18.17
J17.17
GRFC_0
Generic RF controller bit 0
Configurable I/O
1.8V
J18.18
J17.18
WSA_SPKR_SD_N_1
GPIO 105 /WSA8815 control pin
1.8V
J18.19
J17.19
HAP_LINE_OUT3
PWM input for haptic control
1.8V
J18.20
J17.20
WSA_SPKR_SD_N_2
GPIO 106 /WSA8815 control pin
1.8V