ST20-GP6 datasheet(14/123 Pages) STMICROELECTRONICS

номер детали	ST20-GP6

подробное описание детали	GPS PROCESSOR

PDF	123 Pages

Scroll/Zoom	100%

производитель	STMICROELECTRONICS [STMicroelectronics]

домашняя страница	http://www.st.com

Logo

14 / 123 page

ST20-GP6

14/123

determines whether the accumulated carrier phase in the NCO are reset to zero automatically or

continue from their existing value. The bit allocations are given in Table 3.1.

PRNcode0-11 registers

The

PRNcode0-11 registers choose the code for the particular satellite, and writing these causes a

reset to the accumulated carrier phase in the NCO for the corresponding channel, if enabled by the

DSPControl register.

The bit-ﬁelds for selecting particular GPS satellites are given in Table 3.3.

DSPControl

DSP base address + #140

Write only

Bit

Bit ﬁeld

Function

1:0

SampleRate

These bits control the sampling rate (the rate at which data is sent to the DMA

controller). The encoding of these bits is as follows:

SampleRate[1:0]

Transfer period

No. of samples

accumulated

Mode

840

µs

256

Tracking

970

µs

256

µs

Acquisition

µs16

NCOResetEnable

When set to 1, the accumulated NCO phase for a channel is reset when the cor-

responding PRN code register is written.

PRNDisable

When set to 1, all PRN generators are disabled.

Table 3.1

DSPControl register format

PRNcode0-11

DSP base address + #00 to #2C

Write only

Bit

Bit ﬁeld

Function

6:0

PRNcode

Satellite code as a 7-bit value.

Table 3.2

PRNcode0-11 register format

ST20-GP6 датащи(PDF) 14 Page - STMicroelectronics

ST20-GP6 датащи(HTML) 14 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL