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参数资料
| 型号： | GP2021 |
| 厂商： | Mitel Networks Corporation |
| 英文描述： | GPS 12 channel Correlator Advance Information |
| 中文描述： | 全球定位系统12通道相关器研究进展信息 |
| 文件页数： | 60/62页 |
| 文件大小： | 372K |
| 代理商： | GP2021 |
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7
GP2021
Difference between Real and Complex_Input
Mode
The input mode is selected by theFRONT_END_MODE bit
in the SYSTEM_SETUP register. It defaults to Real_Input
mode at power up. The differences between Real and
Complex input mode are summarised in the following table.
Description
Real_Input mode
Complex_Input mode
Recommended Master clock frequency
40MHz
35MHz
GP2021 internal clocking 1
± 7
÷ 6
MICRO_CLK 2 output frequency
20MHz
17.5MHz
mark : space
1:1
Pin No 76
SIGN 0
SIGN_I
Pin No 77
MAG 0
MAG_I
Pin No 78
SIGN 1
SIGN_Q
Pin No 79
MAG 1
MAG_Q
Input Signal Sampling Rate
5.714MHz
5.833MHz
SAMPCLK output frequency
5.714MHz
Not available
mark : space
4:3
(held Low)
)
Notes.
1
The GP2021 interrupt and TIC timebase dividers are clocked by this resulting clock.
2
The MCLK output is derived from this signal. In ARM mode the phases of MCLK are stretched by the
Microprocessor Interface block.
FUNCTIONAL DESCRIPTION
The GP2021 incorporates a 12 Channel GPS Correlator,
together with microprocessor support functions including a
Dual UART, a Real Time Clock and Memory Control Logic for
the ARM60 microprocessor. It can be configured for either
ARM System mode or Standard Interface mode. A block
diagram of the GP2021 is shown in Fig. 3.
Whilst in ARM System mode the Memory Control Logic
allows an ARM60 microprocessor to interface with the
Correlator, Real Time Clock, Dual UART and a variety of
memory devices (i.e.
SRAM, EPROM, Flash and EEPROM), without the need for
external glue logic.
In Standard Interface mode the GP2021 allows most 16
and 32 bit microprocessors to interface with the Correlator,
Real Time Clock and Dual UART. More specifically, this mode
allows the interface to be configured for either Intel or Motorola
style microprocessor interfaces.
In the functional description which follows the correlator is
described first, followed by the peripheral functions.
MEAS_INT
D<15:0>
RXA,
RXB
TXA,
TXB
XIN
XOUT
SIGN, MAG
SAMPCLK
CLK_T, CLK_I
POWER_GOOD
PLL_LOCK
MICRO_CLK
NRESET_IP
NRESET_OP
A<22:20>
ARM60
INTERF
ACE
MEMOR
Y
INTERF
ACE
ALE_IP
NCS
WREN
READ
NARMSYS
A<9:0>
NINTELMOT
WRPROG
12 CHANNEL
CORRELATOR
GPS
POWER &
RESET
CONTROL
DUAL UART
REAL – TIME
CLOCK
CONTROL BUS
DATA BUS
MICROPROCESSOR INTERFACE
ARM SYSTEM
STANDARD
INTERFACE
ACCUM_INT
Fig. 3 : GP2021 block diagram
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相关代理商/技术参数 |
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| GP2021IGGQ1R | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Correlator |
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| GP2030S | 制造商:GTM 制造商全称:GTM 功能描述:N AND P-CHANNEL ENHANCEMENT MODE POWER MOSFET |
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