Specifications

– –
– –
46 47
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
V1 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
V1
Write Command
Header Size Address Value
0xFF 0x02
0x59
0x0E
V1
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
V1 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
V1
Write Command
Header Size Address Value
0xFF 0x02
0x58
0x0D
V1