Справочник Пользователя для Sierra Wireless airprime wismo218
WA_DEV_W218_PTS_002
Rev 005
Page 36 of 109
Product Technical Specification &
Customer Design Guidelines
Figure 5. Example of an SPI to UART2 Interface Conversion Implementation
The following table lists the recommended components to use in implementing the SPI to UART2
interface.
interface.
Component
Description/Details
Manufacturer
U103
SC16IS750IPW
NXP Semiconductors
X101
3, 6864MHz 86SMX surface mount crystal (971-3131)
Farnell
R104, R105
10K
R106
1K
C105
22pF
C106
33pF
C107
100nF
After converting the SPI signal to a UART signal, a UART transceiver circuitry is needed to
communicate this UART signal to DTE.
communicate this UART signal to DTE.