Smart Module Series
SC690A_Series_Hardware_Design 108 / 105
SMD
Surface Mount Device
SMS
Short Message Service
SoC
System on a Chip
STB
Set Top Box
TDMA
Time Division Multiple Access
TD-SCDMA
Time Division-Synchronous Code Division Multiple Access
TRX
Transmit & Receive
Tx
Transmit
UART
Universal Asynchronous Receiver/Transmitter
UHB
Ultra High Band
UL
Uplink
UMTS
Universal Mobile Telecommunications System
URC
Unsolicited Result Code
USB
Universal Serial Bus
(U)SIM
Universal Subscriber Identity Module
VBAT
Voltage at Battery (Pin)
Vmax
Maximum Voltage
Vnom
Nominal Voltage
Vmin
Minimum Voltage
V
IH
max
Maximum High-level Input Voltage
V
IH
min
Minimum High-level Input Voltage
V
IL
max
Maximum Low-level Input Voltage
V
IL
min
Minimum Low-level Input Voltage
V
I
max
Absolute Maximum Input Voltage
V
I
min
Absolute Minimum Input Voltage