atr0625p ATMEL Corporation, atr0625p Datasheet - Page 9

• Manufacturer Part Number: atr0625p
• Description: Gps Baseband Processor Supersense
• Manufacturer: ATMEL Corporation

3.3
3.3.1
4925F–GPS–09/07
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 ATR0625P 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.
In the case that GPSMODE pins with internal pull-up or pull-down resistors are connected to
GND/VDD18, additional current is drawn over these resistors. Especially GPSMODE3 can
impact the back-up current.
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
Note:
(Reset = PD) Description
GPSMODE0
0
1
(1)
1. Leave open
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
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
™
functionality and not used for GPSMODE
ATR0625P
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