TRM-915-R250 datasheet(26/39 Pages) LINX

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ACK on Wake - Address = 0x59; NV Address = 0x0E

When the module powers up and is ready for operation, it can output an

acknowledge (ACK) character (0x06) on the TXD line. This indicates that

the module is ready to accept data and commands. Setting this register to

0x00 disables the ACK, 0x01 enables the ACK. The default value is 0x01.

Figure 49 shows examples of the commands and Figure 50 shows the

available values.

Figure 49: 250 Series ACK on Wake Command and Response

250 Series ACK on Wake Register Settings

Mode

0x00

Disable ACK

0x01

Enable ACK

Figure 50: 250 Series ACK on Wake Register Settings

250 Series ACK on Wake

Read Command

Read Response

Header

Size

Escape

Address

ACK

Address

Value

0xFF

0x02

0xFE

0x59

0x0E

0x06

0x59

0x0E

Write Command

Header

Size

Address

Value

0xFF

0x02

0x59

0x0E

Operating Mode - Address = 0x58; NV Address = 0x0D

The value in the regOPMODE register sets the operating mode of the

transceiver. If the module remains properly powered, and is awakened from

a low power mode properly, the volatile registers retain their values when

awakened. If the volatile registers become corrupted during low power, a

software reset is forced and the module reboots.

Awake mode is the normal operating mode. This is the only mode in which

the RF circuitry is able to receive and transmit RF messages.

Standby leaves the RF oscillator circuit operating for faster wakeup,

whereas Sleep does not. One byte of 0x0F to the module’s RXD line at the

current baud rate wakes the modules.

Deep Sleep mode disables all circuitry on-board the module. This is the

lowest-power mode available for the module. A low pulse on the RESET

line of at least 15µs wakes the module. The module begins the wake

process once the RESET line is returned high.

Please see the Low Power States section for more details. Figure 47 shows

examples of the commands and Figure 48 shows the available values.

Figure 47: 250 Series Operating Mode Command and Response

250 Series Operating Mode Register Settings

Mode

0x00

Awake Mode

0x01

Sleep Mode

0x02

Standby Mode

0x03

Deep Sleep Mode

Figure 48: 250 Series Operating Mode Register Settings

250 Series Operating Mode

Read Command

Read Response

Header

Size

Escape

Address

ACK

Address

Value

0xFF

0x02

0xFE

0x58

0x0D

0x06

0x58

0x0D

Write Command

Header

Size

Address

Value

0xFF

0x02

0x58

0x0D

TRM-915-R250 Datenblatt(PDF) 26 Page - Linx Technologies

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