Specifications

WM_PRJ_Q2501_PTS_001 – 003
March 2004
© 2003 All rights reserved
Page: 19 / 93
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1.5.3 Baseband architecture
The baseband part of WISMO Quik Q2501 includes separate baseband units for
GSM-GPRS and for GPS.
1.5.3.1 GSM-GPRS baseband architecture
W
I
S
M
O
Q
2
5
0
1
S
Y
S
T
E
M
C
O
N
N
E
C
T
O
R
RTC 32 KHZ
I2C/SPI
CONTROLLER
GSM main UART1
CPU DSP
MEMORY
MANAGEMENT
UNIT
SIM
CONTROLLER
VOCODER
KEYBOARD
CONTROLLER
I/O
CONTROLLER
R
F
I
N
T
E
R
F
A
C
E
GSM/GPRS BASEBAND
GPS BASEBAND
SIM INTERFACE
SRAM
FLASH
FOR
GSM
STACK
BUZZER INTERFACE
AUDIO INTERFACES
XTAL 32 KHZ
RESET CIRCUIT
GSM aux UART2
UART SWITCH
A/D
CONVERTER
TEMPERATURE
SENSOR
CTRL
RF GPS
FRONT END
RF GSM
FRONT END
ANTENNAS
CONTROL
GPS ENABLE
GSM ENABLE
GPS POWER
GSM POWER
RTC BACKUP
Figure 4: GSM/GPRS baseband architecture
This GSM/GPRS baseband chipset of WISMO Quik Q2501 is based on a 0.25 µm
mixed CMOS technology, which allows massive integration as well as low
current consumption.