Sierra Wireless airprime wismo218 Manual De Usuario
WA_DEV_W218_PTS_002
Rev 005
Page 22 of 109
Product Technical Specification &
Customer Design Guidelines
Functional Description
The global architecture of the WISMO218 is shown below:
WISMO218
ARM
core
DSP
core
Radio
GSM / GPRS
Digital Interfaces
Analog Interfaces
Memory
UART
ADCs
AUDIO
SIM
Control &
Power
Control
Data
Address
reset
RTC
power
supplys
PWMs
32768
kHz
GPIOs
BUZZER
SPI / I
2
C
Figure 1. Functional Architecture
RF Functionalities
The Radio Frequency (RF) range complies with the Phase II EGSM 900/DCS 1800 recommendation.
The frequency range for the transmit band and receive band are listed in the table below.
The frequency range for the transmit band and receive band are listed in the table below.
Transmit Band (Tx)
Receive Band (Rx)
E-GSM 900
880 to 915 MHz
925 to 960 MHz
DCS 1800
1710 to 1785 MHz
1805 to 1880 MHz
The RF part of the WISMO218 is based on a specific dual band chip which includes:
a Digital low-IF receiver