User manual

GTR64 http://www.matrix.es/GTR64

Data Carrier Detect (DCD)

DCD indicates that the DCE is receiving a valid carrier (data signal) when low. You can define the exact

behaviour of DCD with an AT command.

Ring Indicator (RI)

RI indicates that a ringing signal is being received by the DCE when low. You can define the exact

behaviour or RI with an AT command.

3.7 Expansion I/O port

The GTR64 supports a range of configurable I/Os including a second 2-wire RS232 interface. on the 15

together with I2C bus and VTRC with ALARM functionality.

pin high density connector

GTR64

Signal

Dir

Max. Voltage

limits

Description

1 SCL O -0.5 - +3.6 V

I2C clock sign

2 RD3 I ±5 v

Secondary RS232 UART signal:

Transmitted data

3 TD3 ± 25V

Secondary RS232 UART signal

Received data.

V IL < 0.6V, V IH > 2.4V

4 IO 1 I/O -0.5 - VREF

Digital input/output I/O 1

Digital VREF

5 I -

Digital input/output I/O 3

O 3 I/O 0.5 - VREF

Digital VREF

6 SDA I/O -0.5 - +3.6 V

I2C data

7 VRTC I 1,1 – 1,55 V for real time clock VRTC supply

8 ALARM O -0.5 - +3.6V

RTC Alarm

9 VREF O +3.6 V LEAVE UNCONNECTED !!!

1. SCL 6. SDA 11. IO 2

2. RD3 7. VRTC 12. IO 4

ICE

5. IO 3 10. RI / IO8 15. ADC 1

3. TD3 8. ALARM 13. SERV

4. IO 1 9. VREF 14. GND

GTR64 Integrators Manual V.1.2 Pag. 19

Preliminary. Subject to change without prior notice