12

4890AS–GPS–09/05

ATR0621 [Preliminary]

The following settings apply if GPSMODE configuration is not enabled, that is, GPSMODE = 0

(ROM-Defaults):

3.3.4

USB Power Mode

For correct response to the USB host queries, the device has to know its power mode. This is

configured via GPSMODE7. If set to bus powered, an upper current limit of 100 mA is reported

to the USB host; that is, the device classifies itself as a “low-power bus-powered function” with

no more than one USB power unit load.

Table 3-9.

Supported Messages at Setting High

NMEA Port

Standard

GGA, RMC, GSA, GSV, GLL, VTG, ZDA, GRS, GST

Proprietary

PUBX00, PUBX03, PUBX04

UBX Port

NAV

SOL, SVINFO, POSECEF, POSLLH, STATUS, DOP, VELECEF,

VELNED, TIMEGPS, TIMEUTC, CLOCK

MON

SCHD, IO, IPC

Table 3-10.

Supported Messages at Setting Debug (Additional Undocumented Message

May be Part of Output Data)

NMEA Port

Standard

GGA, RMC, GSA, GSV, GLL, VTG, ZDA, GRS, GST

Proprietary

PUBX00, PUBX03, PUBX04

UBX Port

NAV

SOL, SVINFO, POSECEF, POSLLH, STATUS, DOP, VELECEF,

VELNED, TIMEGPS, TIMEUTC, CLOCK

MON

SCHD, IO, IPC

RXM

RAW (RAW message support requires an additional license)

Table 3-11.

Serial I/O Default Setting if GPSMODE Configuration is Deselected

(GPSMODE0 = 0)

USART1/USB

NMEA

USART2

UBX

Baud Rate (kBaud)

57.6, Auto enabled

57.6, Auto enabled

Input Protocol

UBX, NMEA, RTCM

UBX, NMEA, RTCM

Output Protocol

NMEA

UBX

Messages

GGA, RMC, GSA, GSV

NAV: SOL, SVINFO

Information Messages

(UBX INF or NMEA TXT)

User, Notice, Warning, Error

User, Notice, Warning, Error

Table 3-12.

USB Power Modes

GPSMODE7 (Reset = PU) Description

0

USB device is bus-powered (max. current limit 100 mA)

1

USB device is self-powered (Default)