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STA5620 Datasheet(PDF) 24 Page - STMicroelectronics

Part # STA5620
Description  Fully integrated RF front-end for GPS
PDF  29 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA5620 Datasheet(HTML) 24 Page - STMicroelectronics

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Chip enable and reset timing
STA5620
24/29
Note:
Disabling a digital output buffer means driving it low.
Divider configuration
NDIV[11:0]
PLL Feedback Divider
Division Ratio
(mapped as 2 byte registers)
56 to 4095
96
1555
RDIV[5:0]
Reference Divider Division
Ratio
(write of this register updates
all of the ndiv, rdiv vector)
1 to 63
1
19
Charge pump current selector
CPI[1:0]
Charge Pump Current
Selector
00 = 50
μA
01 = 100
μA
10 = 150
μA
11 = 200
μA
11
11
Output slew rate control
LSR
XTAL_CLK,
GPS_CLK,TEST_CLK,
SPI_DO, SIGN and MAG
Output Drivers Slew Rate
0 = Fast
1 = Slow
11
Table 15.
Default configuration (continued)
Bit Name
Description
Values
(MODE_EN=0)
(MODE_EN=1)



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