1
E01Z12A22-PS
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any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
CXD2931R-9/GA-9
CXD2931R-9
144 pin LQFP (Plastic)
CXD2931GA-9
144 pin LFLGA (Plastic)
1 chip GPS LSI
Description
The CXD2931R-9/GA-9 is a dedicated LSI for the
GPS (Global Positioning System) satellite-based
position measurement system.
This LSI contains a 32-bit RISC CPU, 2M-bit MASK
ROM, RAM, UART, timer, and others.
This LSI, used together with the RF LSI (CXA1951AQ),
enables the configuration of a 2-chip system capable
of measuring its position anywhere on the globe.
Features
16-channel GPS receiver capable of
simultaneously receiving 16 satellites
Supports differential GPS
-- Comforms to RTCM SC-104 Ver. 2.1
-- Supports DARC
All-in-view measurement
2-satellite measurement
Timer supporting GPS time
High performance 32-bit RISC CPU
256K-byte program ROM
36K-byte RAM
3-channel UART
-- Baud rate generator
-- Supports 1.2K, 2.4K, 4.8K, 9.6K, 19.2K and
38.4K baud
-- Supports 1/2/4-byte buffer mode
23-bit general-purpose I/O port capable of defining
input/output independently for each bit
8-bit successive approximation system A/D
converter
Structure
Silicon gate CMOS IC
Absolute Maximum Ratings
Supply voltage
V
DD
V
SS
0.5 to 4.6
V
Input voltage
V
I
V
SS
0.5 to V
DD
+ 0.5 V
Output voltage
V
O
V
SS
0.5 to V
DD
+ 0.5 V
Operating temperature
Topr
40 to +85
C
Storage temperature
Tstg
50 to +150
C
Recommended Operating Conditions
Supply voltage
V
DD
3.0 to 3.6
V
Operating temperature
Topr
40 to +85
C
Input/Output Pin Capacitance
Input capacitance
C
IN
9 (Max.)
pF
Output capacitance C
OUT
11 (Max.)
pF
I/O capacitance
C
I/O
11 (Max.)
pF
2
CXD2931R-9/GA-9
Performance
16-channel GPS receiver
High performance 32-bit RISC CPU
Receiver frequency: 1575.42MHz (L1 band, CA code)
Reception sensitivity
Tracking sensitivity: 145dBm (typ.) when using the antenna of 25dBi, NF = 2dB and the RF amplifier
with the 25dB gain
Reference data using the Sony's reference board.
This value is not guaranteed, depending on the conditions.
Time to First Fix (time until initial measurement after power-on)
Cold Start (without both ephemeris and almanac): 27 to 58s
Warm Start (without ephemeris with almanac):
23 to 45s
Hot Start (with both ephemeris and almanac):
6 to 17s
Reference data with elevation angle of 5 or more and no interception environment on Nov., 2001.
Positioning time with 90% possibility.
These values are not guaranteed, depending on the conditions.
Positioning accuracy
2DRMS: approx. 12m
Reference data with elevation angle of 5 or more and no interception environment.
This value is not guaranteed, depending on the conditions.
Measurement data update time
1s
Interfece format
NMEA0183 (4800bps)
Communication method
Start-stop synchronization
All-in-view
GPS receiver system block diagram using the CXD2931R-9
CXA1951AQ
RF Converter
CXD2931R-9
16ch GPS Processor
1575.42MHz
IF
1.023MHz
RXD
TXD
TCXO
18.414MHz
LNA
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