atr0625 ATMEL Corporation, atr0625 Datasheet - Page 9

• Manufacturer Part Number: atr0625
• Description: Gps Baseband Processor Supersense
• Manufacturer: ATMEL Corporation

3.3
3.3.1
4925A–GPS–02/06
Setting GPSMODE0 to GPSMODE12
Enable GPSMODE Pin Configuration
The start-up configuration of a ROM-based system without external non-volatile memory is
defined by the status of the GPSMODE pins after system reset. Alternatively, the system can
be configured through message commands passed through the serial interface after start-up.
This configuration of the ATR0625 can be stored in an external non-volatile memory like
EEPROM. Default designates settings used by ROM firmware if GPSMODE configuration is
disabled (GPSMODE0 = 0).
Table 3-3.
Table 3-4.
If the GPSMODE configuration is enabled (GPSMODE0 = 1) and the other GPSMODE pins
are not connected externally, the reset default values of the internal pull-down and pull-up
resistors will be used.
Pin
GPSMODE0 (P1)
GPSMODE1 (P9)
GPSMODE2 (P12)
GPSMODE3 (P13)
GPSMODE4 (P14)
GPSMODE5 (P17)
GPSMODE6 (P19)
GPSMODE7 (P23)
GPSMODE8 (P24)
GPSMODE9 (P25)
GPSMODE10 (P26)
GPSMODE11 (P27)
GPSMODE12 (P29) Serial I/O configuration
(Reset = PD) Description
GPSMODE0
0
1
GPSMODE Functions
Enable Configuration with GPSMODE Pins
Ignore all GPSMODE pins. The default settings as indicated below are used.
Use settings as specified with GPSMODE[2, 3, 5 to 8, 10 to 12]
Function
Enable configuration with GPSMODE pins
This pin (EXTINT0) is used for FixNow functionality and not used for GPSMODE
configuration.
GPS sensitivity settings
This pin (NAADET1) is used as active antenna supervisor input and not used for
GPSMODE configuration. This is the default selection if GPSMODE configuration
is disabled.
Serial I/O configuration
USB Power Mode
General I/O Configuration
This pin (NAADET0) is used as active antenna supervisor input and not used for
GPSMODE configuration.
General I/O Configuration
ATR0625 [Preliminary]
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