STA5620 datasheet(23/29 Pages) STMICROELECTRONICS

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STA5620

Chip enable and reset timing

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8.2

Default configuration

This table describes the default configuration of the STA5620 internal registers.

Table 15.

Default configuration

Bit Name

Description

Values

(MODE_EN=0)

(MODE_EN=1)

Sample mode configuration

MST

Sample clock Source Selector

0 = Xtal Osc

1 = VCO/96,

Default xtal/TCXO frequency

16.368MHz

19.200MHz

Power enable configuration

ENM

RF Chain Enable

(From the RFA Input to the

AGC Output)

0 = RF chain OFF,

1 = RF chain On

If RFE bit or RF_EN pin = 1

RFE

RF Chain Enable

(From the RFA Input to the

AGC Output)

0 = controlled by RF_EN pin,

1 = RF chain On

GCE

GPS Clock Enable

0 = GPS clock Off,

1 = GPS clock On

AGC

Automatic Control Gain

Enable

0 = AGC function Off,

1 = AGC function On

XCE

Xtal Clock Enable

0 = Off,

1 = On

IFB

IF Output Buffer Enable

0 = Off,

1 = On

VCO

Voltage Controlled Oscillator

Enable

0 = Off,

1 = On

IF enable

0 = Off,

1 = On

MIX

Mixer enable

0 = Off,

1 = On

RFA

RF Amplifier enable

0 = Off,

1 = On

PLL

Phase Locked Loop Enable

(Dividers, PFD, Charge

Pump).

0 = Off,

1 = On

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