4117047
Rev 2.2
December 18, 2015
26
Product Technical Specification
Detailed Interface Specifications
2.8. USB
The AirPrime HL8518, HL8528 and HL8529 modules have one USB interface.
2.8.1.
Electrical Characteristics
The following table describes the electrical characteristics of the USB interface.
Table 17. Electrical Characteristics of USB
Signal
I/O
I/O Type
Parameter
Min.
Typ.
Max. Unit
USB_D+
I/O
Analog
3.06
3.3
3.6
V
USB_D-
I/O
Analog
3.06
3.3
3.6
V
USB data
(DP, DM)
I/O
Analog
V
IH
: Input Voltage-High
2
-
3.2
V
V
IL
: Input Voltage-Low
-0.3
-
0.8
V
V
OL
: Static Output Voltage-Low
-
-
0.45
V
V
OH
: Static Output Voltage-High
2.45
-
-
V
USB_VBUS I
Analog
Voltage input
4.75
5.0
5.25
V
USB_VBUS Input current consumption
mA
2.8.2.
Pin Description
The following table describes the pin description of the USB interface.
Table 18. USB Pin Description
Pin Number
Signal Name
I/O
I/O Type
Function
12
USB_D-
I/O
3.3V
USB data negative line pad
13
USB_D+
I/O
3.3V
USB data positive line pad
16
USB_VBUS
I
5V
USB VBUS
Note:
When the 5V USB supply is not available, connect USB_VBUS to VBATT to supply the USB
interface.
2.9. Electrical Information I/O
The AirPrime HL8518, HL8528 and HL8529 modules support different groups of digital interfaces with
varying current drain limits. The following table enumerates these interface groupings and enumerates
the electrical characteristics of each digital interface.
The DC characteristics of the pads are compatible with CMOS JEDEC standard EIA/JESD8-5.
Table 19. Digital I/O Electrical Characteristics
Parameter
Min
Typ
Max
Conditions
V
IL
: Input voltage for general digital pad (V)
-0.2
-
VDD*0.2
