Product Info

LTE Standard Module Series
EG95 Series Hardware Design
EG95_Series_Hardware_Design
53 / 99
SPI_CLK
SPI_MOSI
SPI_MISO
Module
SPI_MISO 28 DI
Master input slave output of SPI
interface
1.8 V power domain
The following figure shows a reference design of SPI interface with peripherals.
SPI_CLK
SPI_MOSI
SPI_MISO
Peripherals
Figure 25: Reference Circuit of SPI Interface with Peripherals
NOTE
The module provides 1.8 V SPI interface. A level translator should be used between the module and the
host if customer’s application is equipped with a 3.3V processor or device interface.
3.14. Network Status Indication
The module provides one network indication pin: NETLIGHT. The pin is used to drive a network status
indication LED.
The following tables describe the pin definition and logic level changes of NETLIGHT in different network
status.
Table 16: Pin Definition of Network Status Indicator
Pin Name
Pin No.
I/O
Description
Comment
NETLIGHT
21
DO
Indicate the module’s network activity status
1.8 V power domain
Table 17: Working State of Network Status Indicator
Pin Name Logic Level Changes Network Status
NETLIGHT
Flicker slowly (200 ms High/1800 ms Low) Network searching
Flicker slowly (1800 ms High/200 ms Low) Idle