User Manual

GM47/48 Technical description

BA/SEM/MS 02:0004 Rev B

Note: DSR is considered permanently ready for a module, therefore

any DGND connection may be taken as DSR functionality.

3.10.4 UART 2 - TD2, RD2

The UART 2 consists of a full duplex serial communication. This

involves the transmission and reception lines.

The communication port shall work in one mode: Operation and

Maintenance mode.

Operation and Maintenance mode shall work in addition with

SERVICE signal. On switching the module on, if SERVICE signal is

active then two events can happen. If no data is sent to the module,

then the logger is activated. Otherwise, the module shall be ready to

be reprogrammed.

Timing and Electrical signals characteristics equal to UART 1 TD and

RD, except for maximum baud rate that could be increased to 921

KBPS.

Transmitted Data 2 (TD2)

TD2 is input (to the module) used by the application system to send

data on the UART 2 to the module.

The electrical characteristics shall be the same as TD.

Received Data 2 (RD2)

RD2 is an output used to send data on the UART 2 to the application

system.

The electrical characteristics shall be the same as RD.

3.10.5 UART 3 - TD3, RD3

The UART 3 consists of a full duplex serial communication. This

involves the transmission and reception lines.

Timing and electrical signals characteristics equal to UART 1 TD and

RD.

Transmitted Data 3 (TD3)

TD3 is input (to the module) used by the application system to send

data on the UART 3 to the module.

The electrical characteristics shall be the same as TD.