ATR0635 Datasheet, PDF (9/33 Pages) ATMEL Corporation – ANTARIS4 Single-chip GPS Receiver SuperSense

ATR0635
Table 3-1. ATR0635 Pinout (Continued)
Pin Name BGA 96
VDD_USB⁽³⁾ A10
Pin Type
Supply
Pull Resistor
(Reset Value)⁽¹⁾
Firmware Label
PIO Bank A
I
O
VDD18
H9
Supply
VDD18
G11
Supply
VDD18
F12
Supply
VDD18
B9
Supply
VDD18
E5
VDDIO⁽⁴⁾
B5
Supply
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
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.
3.2 Signal Description
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
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