Rainbow-electronics ATR0635P1 Manual do Utilizador descarregar pdf (Página 9)

4979D–GPS–06/08

ATR0635P1

3.2 Signal Description

VDD_USB

(3)

A10 Supply

VDD18 H9 Supply

VDD18 G11 Supply

VDD18 F12 Supply

VDD18 B9 Supply

VDD18 E5 Supply

VDDIO

(4)

B5 Supply

VDDIO H5 Supply

VDIG A5 Supply

X A2 Analog OUT

XT_IN A12 Analog IN

XT_OUT B12 Analog OUT

XTO A1 Analog Input

Table 3-2. Signal Description

Pin Number Pin Name Type Active Level Pin Description/Comment

RF Section

D1 RF ANALOG IN - Input from SAW filter

C1 NRF ANALOG IN - Inverted input from SAW filter

GPS XTAL Section

A1 XTO ANALOG IN - TCXO input (23.104 MHz)

B3 NXTO ANALOG IN - Inverted TCXO input (23.104 MHz)

A2 X ANALOG OUT - XTO interface (capacitor)

B2 NX ANALOG OUT - Inverted XTO interface (capacitor)

RTC Section

A12 XT_IN ANALOG IN - Oscillator input (32.768 kHz)

B12 XT_OUT ANALOG OUT - Oscillator output (32.768 kHz)

Automatic Gain Control, bandwidth setting

A4 AGCO ANALOG IO - Automatic gain control analog voltage, connect shunt capacitor to GND

D4 EGC DIGITAL IN -

Enable external gain control

(high = software gain control, low = automatic gain control)

G12 AGCOUT0 DIGITAL OUT - Software gain control

C4 SDI DIGITAL IN - Software gain control

Table 3-1. ATR0635P1 Pinout (Continued)

Pin Name BGA 96 Pin Type

Pull Resistor

(Reset Value)

(1)

Firmware Label

PIO Bank A

Notes: 1. PD = internal pull-down resistor, PU = internal pull-up resistor, OH = switched to Output High at reset

2. VBAT18 represent the internal power supply of the backup power domain, see section “Power Supply” on page 20.

3. VDD_USB is the supply voltage for following the USB pins: USB_DM and USB_DP, see section “Power Supply” on page

20. For operation of the USB interface, supply of 3.0V to 3.6V is required.

4. VDDIO is the supply voltage for the following GPIO pins: P1, P2, P8, P12, P14, P16, P17, P18, P19, P20, P21, P23, P24,

P25, P26, P27 and P29, see section “Power Supply” on page 20.

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