5: Carrier Board
Snapdragon 845 HDK Hardware Development Kit User Guide
29
Table 5-8 NFC Expansion Header J2401 pin out
Description
Signal
Pin NO
Description
Signal
Pin NO
QUP0
NFC_SPI_CLK J2401[1]
QUP0
NFC_SPI_MIS
O
J2401[2]
NFC power
request via
GPIO116
NFC_ESE_PW
R_REQ
J2401[3]
SIM present
GPIO via SDA
GPIO112
UMI1_DET_N
J2401[4]
SIM Card DATA
line (UIM1) via
UIM1_DATA
J2401[5]
3.9V
PROCESSOR
BOARD
VPH_PWR
J2401[6]
SIM Card Reset
line (UIM1) via
SDA GPIO111
UIM1_RESET
J2401[7]
NFC interrupt IRQ
pin via SDA
GPIO63
NFC_IRQ
J2401[8]
SIM CLK line
(SIM1) via SDA
GPIO110
UIM1_CLK
J2401[9]
NFC Disable
signal via SDA
GPIO12
NFC_ENABLE J2401[10]
1.8V Voltage
regulator supply
max 150mA via
PM845
VREG_L9A_1
P8
J2401[11]
QUP3 I2C SDA
line
NFC_I2C3_SD
A
J2401[12]
1.8V Voltage
regulator supply
via PM845
VREG_S4A_1
P8
J2401[13]
QUP3 I2C CLK
line
NFC_I2C3_SC
L
J2401[14]
GND
GND
J2401[15]
NFC clock
request signal via
PM GPIO21
NFC_LNBBCL
K3_EN
J2401[16]
PM845 free
running clock via
buffer
LN_BB_CLK3_
NFC
J2401[17]
NFC download
request via SDA
GPIO62
NFC_DWL_RE
Q
J2401[18]
QUP0
via SDA GPIO3
NFC_SPI_CS_
N
J2401[19]
QUP0
via SDA GPIO1
NFC_SPI_MO
SI
J2401[20]
In general, if there is no need for NFC application, this expansion header can provide two GPIOs,
I2C, free running clocks, and enable voltage/ power source to external peripherals.
Headset Jack J1501
Figure 5-8 Headphone Jack
The headset jack (J1501) is standard 3.5mm, Normal Open style. The hardware supports US
Standard CTIA headset by default.
