Maestro A2200-A Manual do Utilizador descarregar pdf (Página 22)

V1.0-Mar-14

User’s Manual

Page 22 of 43

5.2 Description A5100-A Signals

Symbol

Function

Description

GPIO2

Input/Output

Leave open

VOUT

Voltage output

Permanent VCC-0.1 V voltage output for up to 50mA current

max

TX0/

SPI DO/

I2C CLK

Output

Serial output 0, NMEA out if configured for UART

SPI data out pin when module works in SPI mode

I2C clock pin when module works in host port I2C mode

RX0/

SPI DI/

I2C DIO

Input

Serial input 0, NMEA in if configured for UART

SPI data in pin when module works in SPI mode

I2C data I/O pin when module works in host port I2C mode.

N.C.

None

Leave open

ON_OFF

Input

Connect to push-pull output! This is mandatory!

- Set to LOW by default

- Toggle to HIGH and back to LOW

> for first start-up after power on

> to request a fix in SiRFaware

or PTF mode

> to go into or wake up out of hibernate mode

- Connect it to WAKEUP pin for self-start mode

GND

Power Supply

Ground (power supply)

GND

Power Supply

Ground (power supply)

VANT

Antenna Supply

Voltage Input

Power supply input for external active antenna – provide ac-

cording voltage (up to 5.0 VDC) – switched internally

ANT_GND

RF GND

Antenna Ground

ANT_IN

Antenna Input

Antenna signal / Z=50 Ohm (antenna input) – must not exceed

30dB gain including cable loss

N.C.

None

Leave open

N.C.

None

Leave open

TM_GPIO5

Output

Time Mark – 1PPS signal

N.C.

None

Leave open

N.C.

None

Leave open

GPIO6/

CTS/

SPI CLK

Input

Configuration pin to run in UART mode (10k pull-up to

3.3V, e.g. to pin 3),

Leave open for SPI & host port I2C modes.

SPI clock pin when module works in SPI mode

GPIO7/

RTS/

SPI CS

Input

Configuration pin for communication mode. 10K to GND

for host port I2C mode; leave open for SPI & UART

modes.

SPI chip select pin when module works in SPI mode

WAKEUP

Output

- Status of digital section, Push-Pull output

Low = OFF, KA (Keep Alive)-only, Hibernate, or Standby

mode

High = ON, operational mode

- Connect it to ON_OFF pin for self-start mode

VCC

Power Supply

3.0 – 3.6 VDC (power supply)

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