Smart Module Series
SC20_Series_Hardware_Design 26 / 133
SPKP
10
AO
Speaker output
(+)
SPKN
11
AO
Speaker output (-)
HPH_R
136
AO
Headphone right
channel output
HPH_GND
137
AI
Headphone
reference ground
HPH_L
138
AO
Headphone left
channel output
HS_DET
139
AI
Headset hot-plug
detect
High level by
default.
USB Interface
Pin Name
Pin
No.
I/O
Description
DC Characteristics Comment
USB_VBUS
141,
142
PI
USB 5 V power
input and USB
insertion detection
Vmax = 6.3 V
Vmin = 4.35 V
Vnom = 5.0 V
USB_DM
13
AIO
USB 2.0
differential data (-)
Compliant with
USB 2.0 standard.
Require differential
impedance of 90 Ω.
USB_DP
14
AIO
USB 2.0
differential data
(+)
USB_ID
16
AI
USB ID detect
High level by
default.
(U)SIM Interfaces
Pin Name
Pin
No.
I/O
Description
DC Characteristics Comment
USIM2_DETECT
17
DI
(U)SIM2 card
hot-plug detect
V
IL
max = 0.63 V
V
IH
min = 1.17 V
Active low.
Externally pull it up
to 1.8 V.
If unused, keep this
pin open.
USIM2_RST
18
DO
(U)SIM2 card
reset
V
OL
max = 0.4 V
V
OH
min =
0.8 × USIM2_VDD
USIM2_CLK
19
DO
(U)SIM2 card
clock