Maestro A2100-A Manual de usuario descargar pdf (Pagina 20)

V1.3 – Jul-12 User’s Manual Page 20 of 32

5.2 Description A2035-H Signals

Table 5: Pin description A2035-H

Pin Symbol Function Description

1 nRST Input Reset input, active low

2 BOOTSEL Input Special boot mode – leave open for normal operation;

1.8V for boot loader active

3 Vcc Power Supply 3.0 – 3.6 V DC

4 WAKEUP Output Status of digital section

5 Vout Voltage

Output

Permanent 1.8V voltage output for up to 20mA current

max.

6 GND Power Supply Ground (power supply)

7 GPIO6 /

CTS/

SPI CLK

Input Configuration pin for communication mode. 10K to

1.8V for UART mode; leave open for SPI mode.

SPI clock pin when module works in SPI mode

8 GPIO7 /

RTS/

SPI CS

Input SPI chip select pin when module works in SPI mode

9 GND Power Supply Ground (power supply)

10 NC None Mechanical fixture only

11 NC None Mechanical fixture only

12 NC None Leave open

13 NC None Leave open

14 ExtInt 2 /

GPIO4

Input

External interrupt input pin – reserved for future use,

leave open

15 TM_GPIO

Output Time Mark – 1PPS signal

16 I2C CLK Input I2C clock input for MEMS interface

17 I2C DIO Input / Output I2C I/O for MEMS interface

18 ON_OFF Input Connect to push-pull output 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

19 ExtInt /

GPIO8

Input Interrupt input for MEMS interface.

(If ExtInt is not going to be used, it is recommended that this

pin be tied directly to ground. Otherwise, a 100K pull-down

resistor to ground should be connected to the ExtInt pin.)

20 TX0 / SPI

Output Serial output 0.

NMEA out if configured for UART;

SPI data out pin when module works in SPI mode

21 RX0 / SPI

Input Serial input 0.

NMEA in if configured for UART;

SPI data in pin when module works in SPI mode

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 31 32

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