ATR0621-7FQY ATMEL [ATMEL Corporation], ATR0621-7FQY Datasheet - Page 10

• Manufacturer Part Number: ATR0621-7FQY
• Description: GPS Baseband Processor
• Manufacturer: ATMEL [ATMEL Corporation]

3.3
3.3.1
3.3.2
10
Setting GPSMODE0 to GPSMODE12
ATR0621 [Preliminary]
Enable GPSMODE Pin Configuration
Sensitivity Settings
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.
If Flash memory is available, configuration data can be stored in Flash memory. If EEPROM
memory is connected, configuration data can be stored in EEPROM. Default designates set-
tings used by ROM firmware if GPSMODE configuration is disabled (GPSMODE0 =0).
Table 3-3.
Table 3-4.
Table 3-5.
Pin
GPSMODE0
GPSMODE1
GPSMODE2
GPSMODE3
GPSMODE4
GPSMODE5
GPSMODE6
GPSMODE7
GPSMODE8
GPSMODE9
GPSMODE10
GPSMODE11
GPSMODE12
(Reset = PD) Description
GPSMODE3
GPSMODE0
(Fixed PU)
0
0
1
1
0
1
GPSMODE Functions
Enable Configuration with GPSMODE Pins
GPS Sensitivity Settings
Ignore all GPSMODE pins. The default settings as indicated below are used
Use settings as specified with GPSMODE[2, 3, 5 to 8, 10 to12]
(Reset = PU) Description
GPSMODE2
Function
Enable configuration with GPSMODE pins
This pin is used for FixNow functionality and not used for GPSMODE configuration
USB Power Mode
General I/O Configuration
Serial I/O configuration
GPS sensitivity settings
This pin (NAADET1) is used as active antenna supervisor input and not used for
GPSMODE configuration
Serial I/O configuration
This pin (NAADET0) is used as active antenna supervisor input and not used for
GPSMODE configuration
General I/O Configuration
0
1
0
1
Auto mode
Fast mode
Normal mode (Default)
High sensitivity
4890AS–GPS–09/05