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Product Technical Specification
Table 13.
USIM1 Pad Description
Pad Number
26
27
28
29
64
Refer to the
following table for the electrical characteristics of the USIM1 interface.
Table 14.
USIM1 Electrical Characteristics
Parameter
UIM1 Interface Voltage (V)
(VCC, CLK, IO, RESET)
UIM1 Detect
UIM1_VCC Current (mA)
Refer to section 5.6 USIM1 Application for a USIM application example.
3.4.1.
UIM1_DET
UIM1_DET is used to detect and notify the application about the insertion and removal of a USIM
device in the USIM socket connected to the main USIM interface (UIM1). When a USIM is inserted, the
state of UIM1_DET transitions from logic 0 to logic 1. Inversely, when a USIM is removed, the state of
UIM1_DET transitions from logic 1 to logic 0.
Enabling or disabling this USIM detect feature can be done using an AT command. Refer to document
[2] AirPrime HL77xx AT Commands Interface Guide for more information.
3.5. USB Interface
The AirPrime HL77xx modules have one Universal Serial Bus interface compliant with USB Rev 2.0
(self-powered).
Refer to the following table for the pad description of the USB interface.
Table 15.
USB Pad Description
Pad Number
12
13
41110555
Signal Name
UIM1_VCC
UIM1_CLK
UIM1_DATA
UIM1_RESET
UIM1_DET / GPIO3
Minimum
-
-
-
Signal Name
USB_D-
USB_D+
Rev 1.0
Description
1.8V USIM1 Power supply
1.8V USIM1 Clock
1.8V USIM1 Data
1.8V USIM1 Reset
1.8V USIM1 Detection
Typical
Maximum
1.80
-
1.80
-
-
10 (TBC)
I/O
I/O
I/O
Detailed Interface Specifications
Multiplex
GPIO3
Remarks
The appropriate output
voltage is auto detected and
selected by software.
High active
Function
USB Data Negative
USB Data Positive
November 01, 2017
26
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