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参数资料
| 型号： | GP2000 |
| 厂商： | Mitel Networks Corporation |
| 英文描述： | () |
| 中文描述： | （） |
| 文件页数： | 22/25页 |
| 文件大小： | 256K |
| 代理商： | GP2000 |
6
GP2000 – GPS CHIPSET DESIGNER’S GUIDE
GP2021 DIGITAL CORRELATOR ARCHITECTURE
FEATURES
s 12 Fully Independent Correlation Channels
s On-chip Dual UART and Real-time Clock
s Compatible with 16-bit and 32-bit Microprocessors
s Memory Control Logic for the ARM60
Microprocessor
FUNCTIONAL OVERVIEW
The GP2021 (Fig. 7) can have all channels configured inde-
pendently. Each channel can also be disabled for power saving
and microprocessor bandwidth purposes.
The GP2021 accepts 1-bit or 2-bit digital signals through one
of two pairs of selectable inputs so that it can be used with up to
two antennas. It can also be configured to accept input signals
in real (both components in-phase) or complex (one compo-
nent in-phase, the other component quadrature phase) form.
The GP2021 supplies two programmable interrupts for ac-
cessing the accumulation and measurement data.
The 40MHz clock required by the correlator chip can be de-
rived from a GP2010 or GP2015 front end.
Microprocessor Interface
The GP2021 is compatible with 16- and 32-bit microproces-
sors. It supports four styles of microprocessor:
ARM60
Motorola
Intel 80186
Intel 486
In ARM60 mode, on-chip logic provides direct interfacing to
the ARM60 microprocessor and the system’s memory without
any additional supporting hardware. For other microprocessors,
additional external logic may be required.
Dual UART
There are two independent UARTs on the GP2021 which
have programmable data rates, for both transmit and receive,
Fig. 7 GP2021 block diagram
between 300 and 768Kbaud. The parity bit can be programmed
to be odd, even or none.
There are 8 byte deep FlFOs on both transmit and receive.
The UARTs are accessed by polling
Real Time Clock
The real time clock (RTC) uses a 32kHz watch crystal and
can be used to maintain a measure of elapsed time during
GP2021 Power-down mode. This can be used to improve the
TTFF by enabling prediction of satellite visibility and Doppler
frequency offsets from the estimated receiver location.
Using a 24-bit 1-second counter, the RTC has a range of
approximately 194 days.
The RTC Block also contains a Watchdog which causes a
chip reset if it is not accessed for approximately 2 seconds. The
Watchdog function can be disabled.
Power and Reset Control
The GP2021 has a Power-down mode which allows the
supply voltage to drop to 22V (minimum). In this mode all
GP2021 functions are disabled except for the RTC. During
power-down the microprocessor clock is maintained to the end
of the current clock cycle (falling edge) to prevent corruption of
battery backed RAM, and all inputs (except those relevant to
the Power and Reset Control block) are clamped to known logic
levels to prevent power consumption by extraneous switching.
There is no requirement for external pull-up or pull-down
resistors. A GP2021 reset can also be initiated by use of the
front end PLL lock indicator pin.
GPS
12-CHANNEL
CORRELATOR
POWER AND
RESET
CONTROL
MICRO_CLK
RESET_0/P
A<22:20>
ARM60
INTERFACE
MEMORY
INTERFACE
ARM SYSTEM
ALE_I/P
CS
WREN READ
STANDARD INTERFACE
MICROPROCESSOR INTERFACE
DUAL UART
REAL TIME CLOCK
WRPROG
INTEL/ MOT
A<9:0>
ARMSYS
D<15:0>
SIGN & MAG
SAMPCLK
CLK_T & CLK_I
POWER_GOOD
PLL_LOCK
RESET_I/P
ACCUM_INT
MEAS_INT
RXA
RXB
XIN
XOUT
TXA
TXB
s Compatible with GP2010 and GP2015 RF Front
Ends
s Power Dissipation 150mW Typical
s Low Voltage/Current Power-down Mode
s Battery Back-up Voltage 22V (Minimum)
相关PDF资料 |
PDF描述 |
|---|---|
| GP2010 | GPS Receiver RF Front End |
| GP2010 | GPS Receiver RF Front End(用于全球定位系统（GPS）接收器的第二代RF前端) |
| GP2015 | Aluminum Electrolytic Radial Leaded Low Profile Wide Temp Capacitor; Capacitance: 22uF; Voltage: 25V; Case Size: 5x9 mm; Packaging: Bulk |
| GP2015 | GPS Receiver RF Front End(用于全球定位系统（GPS）接收器的第二代RF前端) |
| GP2021 | GPS 12 channel Correlator(用于全球定位系统（GPS）接收器的12通道的C/A代码基带相关器) |
相关代理商/技术参数 |
参数描述 |
|---|---|
| GP20-005R | 制造商:FRONTIER 制造商全称:Frontier Electronics. 功能描述:2A GENERAL PURPOSE PLASTIC RECTIFIER |
| GP2000-D11-L25-0.3 | 制造商:t-Global Technology 功能描述:THERMAL PAD TUBE 11X25X0.3MM |
| GP2000-D11-L30-0.3 | 制造商:t-Global Technology 功能描述:THERMAL PAD TUBE 11X30X0.3MM |
| GP2000-D13.5-L25-0.3 | 制造商:t-Global Technology 功能描述:THERMAL PAD TUBE 13.5X25X0.3MM |
| GP2000-D13.5-L30-0.3 | 功能描述:THERMAL PAD TUBE 13.5X30X0.3MM 制造商:t-global technology 系列:GP2000 零件状态:有效 使用:- 形状:圆形 外形:30.00mm x 13.50mm 厚度:0.012"（0.305mm） 材料:硅树脂橡胶 粘合剂:- 底布，载体:- 颜色:绿 热阻率:- 导热率:1.3 W/m-K 标准包装:1 |
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