CXD2956AGL-1 Datasheet PDF - Sony Electronics

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CXD2956AGL-1
Sony Electronics

Part Number CXD2956AGL-1
Description GPS Baseband Lsi
Page 18 Pages


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GPS Baseband LSI
CXD2956AGL-1
Description
The CXD2956AGL-1 is a dedicated LSI for the GPS
(Global Positioning System), satellite-based location
measurement system.
Compared with conventional methods, position
detection time and sensitivity are substantially
improved with the use of an advanced signal
processing scheme.
Although package sizes differ, the CXD2956AGL-1
has realized compatibility with a foot pattern to the
CXD2963GH.
This LSI used together with the Sony GPS RF down
converter IC enables the configuration of a 2-chip
system capable of measuring its position anywhere
on the globe. The CXD2956AGL-1 is ideal for use in
automotive, cellular handset, handheld navigation,
mobile computing and other location-based applications.
Features
12-channel GPS receiver capable of simultaneously
receiving 12 satellites
Reception frequency: 1575.42MHz
(L1 band, CA code)
Reference clock (TCXO) frequency:
18.414MHz (GPS, Sony compatible),
32-bit RISC CPU (ARM7TDMI)
288K-byte Program ROM
72K-byte Data RAM
Power is supplied only to 8K-byte Data RAM while
in backup mode.
System power management
1-channel UART
Internal RTC (Real Time Clock)
10-bit successive approximation system A/D
converter
All-in-view positioning
Communication format: Supports NMEA-0183
Supports DGPS (optional)
Conforms to RTCM SC-104 Ver. 2.1 and DARC
1 PPS output
Supports assisted-GPS for cellular (optional)
183 pin VFLGA (Plastic)
Absolute Maximum Ratings
Supply voltage I/O IOVDD
Supply voltage core CVDD
Input voltage
VI
Output voltage
VO
Operating temperature Topr
Storage temperature Tstg
–0.5 to +4.6
–0.5 to +2.5
–0.5 to +6
–0.5 to +6
–40 to +85
–50 to +150
V
V
V
V
°C
°C
Recommended Operating Conditions
Supply voltage I/O IOVDD 3.0 to 3.6
Under operation with internal ROM, using no
external expansion bus: IOVDD 2.6 to 3.6V
Under operation in backup mode:
BKUPIOVDD 2.5 (Min.) V
Supply voltage core CVDD 1.62 to 1.98
Operating temperature Topr –40 to +85
V
V
°C
Input/Output Pin Capacitance
Input capacitance
CIN
Output capacitance COUT
I/O capacitance
CI/O
9 (Max.)
11 (Max.)
11 (Max.)
pF
pF
pF
Structure
Silicon gate CMOS IC
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
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.
–1–
E04729-PS



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CXD2956AGL-1
Performance
Tracking sensitivity: –152dBm (average) or less
Acquisition sensitivity: –139dBm (average) or less in normal mode
–150dBm (average) or less in high sensitivity mode
Reference data using the Sony's reference board when using both an antenna of 25dBi gain and a RF
amplifier with NF 2dB, 25dB gain.
TTFF (Time to First Fix):
Time until initial position measurement after power-on with the following conditions:
Cold Start (without both ephemeris and almanac time): 50s (average) / 60s (95% possibility)
Warm Start (without ephemeris but with almanac time): 35s (average) / 40s (95% possibility)
Hot Start (with both ephemeris and almanac time): 2s (minimum) / 6s (95% possibility)
Reference data with elevation angle of 5° or more and no interception environment with satellite powers
–130dBm. (Not in high sensitivity mode)
Note) "95% possibility" means "position time with 95% possibility".
Positioning accuracy:
2DRMS: approx. 5m
Reference data with elevation angle of 5° or more and no interception environment with satellite powers
–130dBm.
Measurement data update time: 1s
Current consumption:
40mW (average) while position calculating with tracking satellites in low power mode
90mW (average) while position calculating with acquiring and tracking satellites
Reference data using the Sony's reference board when the reference clock input is 18.414MHz, and its
amplitude is 3.3V swing.
1PPS output
1µs or less precision, 1PPS outputs from ECLKOUT (Pin 97).
Note) These values are not guaranteed, depending on the conditions.
–2–



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Block Diagram
IF
1.023MHz
CXD2956AGL-1
TCXO
Reference clock
18.414MHz
(GPS,
Sony compatible)
Acquisition Block
Acquire GPS signals
Tracking Block
Locking to GPS signals
12ch correlations
Costas Loop & DLL
Computation & Control
Control acquisition &
Tracking block
Position calculation
ARM7TDMI
RTC
Timer
3ch
RAM
72KB
ROM
288KB
X'tal
32.768kHz
External bus
UART
A/D
–3–



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CXD2956AGL-1
Pin Configuration (Top View)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
40 42
34 31 32 26 22 18 14 12
9
6
3
1
AA
NC
NC
NC
NC
NC
NC
TCK
TDO CVSS1 IOVSS1 EPORT11 EPORT8 EPORT5 EPORT2 EPORT0
46 44 43 35 33 30 28 24 20 16 11
8
5
2 176 173
BB
NC NC NC NC NC NC TMS TDI TRST ETCXO EPORT10 EPORT7 EPORT4 EPORT1 IOVDD6 ERXD0
48 47 45 41 39 37 36 27 23 21 17 13 10
7
4
175
CC
NC NC NC NC NC NC NC ETESTTCK ETESTTDO ETESTTINT EXTCXO EPORT12 EPORT9 EPORT6 EPORT3 NC IOVSS7
50 49 55
D
NC NC NC
38 29 25 19 15
NC ETESTTMS ETESTTDI CVDD1 IOVDD1
172 171
NC CVDD6 CVSS6
D
56 52 51
E
NC NC NC
174
ETXD0
169
ED1
167
ED3
E
58 54 53
F
NC NC NC
170 165 163
ED0 ED5 ED7
F
57 59 60 61
G
NC NC NC NC
168 166 161 159
ED2
ED4
ED9 ED11
G
62 64 65 66
H
CVSS2 ETEST0 ETEST1 ETEST2
164 162 157 155
ED6
ED8 ED13 ED15
H
63 68 67 69
J
CVDD2 EA18 EA19 EA17
160
ED10
158
ED12
154 153
IOVDD5 IOVSS6
J
70 72 71 73
K
EA16 EA14 EA15 EA13
156
ED14
148 152 151
ED16 ETESTXRS EXRS
K
75 74 77
L
IOVSS2 EA12 EA11
NC
146
ED18
144
ED20
150
CVDD5
NC
L
76 79
M
IOVDD2 EA9
NC
142
ED22
147
ED17
149
CVSS5
M
81 83 78
N
CVSS3 EA7
EA10
140
ED24
143
ED21
145
ED19
N
82 85 80
P
CVDD3 EA5
EA8
105 108 110 112 122
EVIN2 EAVDAD ETEST3 IOVDD7 ECLKS2
138
ED26
139
ED25
141
ED23
P
88 87 90 94 98 102 103 106 111
121 120 126 128 136 135 137
RR
EA2 EA3 EA0 ECLKO EXROMI EADVRB EVIN0 EVIN3 ETEST4 NC ECLKS1 ECLKS0 EXOE EXWE2 ED28 ED29 ED27
86 84 92 93 97 100 104 109 114 116 118 125 124 130 134 132 133
TT
EA4
EA6 CVDD4 ECLKI ECLKOUT EAVDPLL EVIN1 IOVSS8 BKUPCVDD ECCKO BKUPIOVDD EXCS1 EXCS0 EXWE0 ED30 IOVDD4 ED31
89 91 95 96 99 101 107 113 115 117 119 123 127 129 131
UU
EA1 CVSS4 IOVSS3 IOVDD3 EAVSPLL EAVSAD EADVRT BKUPCVSS ECCKI BKUPIOVSS EOSCEN IOVSS4 EXWE3 EXWE1 IOVSS5
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
: Pin 1 index.
–4–



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