Sierra Wireless HL7748 사용자 설명서
41110555
Rev 1.0
September 21, 2017
34
Product Technical Specification
Detailed Interface Specifications
Refer to the following table for the electrical characteristics of the WAKE-UP interface.
Table 31.
WAKE-UP Electrical Characteristics
I/O Type
Parameter
Minimum
Typical
Maximum
Unit
Digital
V
IL
0.3
V
V
IH
0.7 x VDDIO*
V
*
VDDIO = VGPIO = 1.8 V.
3.16. Fast Shutdown Signal (FAST_SHUTDOWN)
The AirPrime HL77xx modules provide one FAST_SHUTDOWN signal.
Refer to the following table for the pad description of the
FAST_SHUTDOWN
interface.
Table 32.
FAST_SHUTDOWN Pad Description
Pad Number
Signal Name
I/O
I/O Type
Description
65
FAST_SHUTDOWN
I
1.8V
Shuts down the module without
deregistration from the network
deregistration from the network
Refer to the following table for the electrical characteristics of the FAST_SHUTDOWN interface.
Table 33.
FAST_SHUTDOWN Electrical Characteristics
I/O Type
Parameter
Minimum
Typical
Maximum
Unit
Digital
V
IL
0.3xVDDIO
V
V
IH
0.7 x VDDIO
V
*
VDDIO = VGPIO = 1.8 V.
3.17. PWM
The AirPrime HL77xx modules provide one PWM signal that can be used in conjunction with an
external transistor for driving a vibrator, or a backlight LED.
external transistor for driving a vibrator, or a backlight LED.
The PWM uses two 7-bit unsigned binary numbers – one for the output period and one for the pulse
width or the duty cycle.
width or the duty cycle.
The relative timing for the PWM output is shown in the figure below.
Figure 8.
Relative Timing for the PWM Output