LISA-C2 series and FW75-C200 - System Integration Manual
UBX-13000620 - R21
Early Production Information
System description
Page 9 of 103
in close proximity to the crystal oscillator. A lookup table is saved over temperature and time. The known
frequency difference of the free running crystal oscillator is corrected in the baseband processor enabling quick
acquisition.
Baseband section and power management unit
Another shielding section includes all the digital circuitry and the power supplies, basically the following
functional blocks:
•
Wireless baseband mixed signal ASIC, which integrates:
•
Microprocessor for controller functions, CDMA upper layer software
•
ARM9 coprocessor and HW accelerator for CDMA Layer 1 control software and routines
•
Dedicated HW for peripherals control (UART, USB, etc.)
•
Memory system in a Multi-Chip Package (MCP) integrating two devices:
•
NOR flash non-volatile memory
•
DDR SRAM volatile memory
•
Power Management Unit (PMU), used to derive all the system supply voltages from the module supply VCC
1.3
Pin description
Table 2 provides a summary of the module pin names and descriptions.
For the exact specification including pin numbering and additional information see the
LISA-C2 series Data
Sheet
[1] or the
FW75-C200 Data Sheet
Name
Module
Power
domain
I/O Description
Remarks
VCC
All
VCC
-
Module supply
Module supply input
V_INT
FW75-C200
LISA-C2
-
-
O
O
Digital I/O Interfaces
supply output
Digital I/O Interfaces
supply output
V_INT = 2.85V (typical) generated by the module
when it is switched-on and the RESET_N (external
reset input pin) is not forced to the low level.
V_INT = 1.8V (typical) generated by the module
when it is switched-on and the RESET_N (external
reset input pin) is not forced to the low level.
PWR_ON
All
POS
I
Power-on input
PWR_ON pin has Internal pull-up resistor.
GPIO1-5
LISA-C2
GDI
I/O
GPIO
RESET_N
LISA-C2
ERS
I
External reset input
RESET_N pin has Internal pull-up resistor.
HW_SHUTDOWN FW75-C200
ERS
I
External Shutdown input
HW_SHUTDOWN pin has Internal pull-up resistor.
ANT(Main RF)
All
-
-
Transmit & Receive
Primary RF antenna
STATUS
FW75-C200
GDI
O
External transistor base
drive for LED Indicator
Indicated by buffered External LED :
Off – not powered
On – powered, associated, and authenticated but
not transmitting or receiving.
Slow Blink – powered, but not associated or
authenticated; searching.
Intermittent Blink – powered; activity proportional
to transmitting/receiving speed. For voice
applications, turning off and on the intermittent
blink based on the ring pulse cycle can indicate a
ring event.
RI
LISA-C2
FW75-C200
GDI
O
UART ring indicator
Circuit 125 (RI) in ITU-T V.24.
Value at internal reset: T/PU.
Use to wake up host processor. The output signal is
active low.
Internal active pull-up to 1.8 V.
Internal active pull-up to 2.85 V
