Serial Interface Baud Rate - Laird RM024 User Manual
Ramp wireless module
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Also See for RM024:
- User manual (62 pages) ,
- Hardware integration manual (24 pages) ,
- Hardware integration manual (19 pages)
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RM024
User Guide
Serial Interface Baud Rate
In order for the OEM host and a transceiver to communicate over the serial interface, they must have the same
serial data rate. This value determines the baud rate used for communicating over the serial interface to a
transceiver. For a baud rate to be valid, the calculated baud rate must be within ±3% of the OEM host baud rate.
Table 2: Baud Rate/Interference Rate
Desired Baud Rate
230400
2
115200
57600
38400
28000
19200
14400
9600
4800
2400
1200
Non-standard
1. Interface timeout = 200 µs per increment, the EEPROM address 0x58 is ignored if Auto Config is enabled.
To use a non-standard Interface timeout, disable Auto Config.
2. Default baud rate.
For baud rates other than those shown in
Baud Rate =
Where:
FREQUENCY = 26 MHz
BAUD_M = EEPROM Address 0x43
BAUD_E = EEPROM Address 0x44
Minimum Interface Timeout =
Tips:
The RM024 supports a majority of standard as well as non-standard baud rates. To select a standard baud
rate, use the value shown for EEPROM address 0x42 in
program EEPROM address 0x42 (Custom Baud Enable) to 0xE3 and then use the equation above to solve for
BAUD_M and BAUD_E.
Adjusting the serial interface baud rate does not affect the RF data rate.
Radio can accept serial combinations (number of bits, parity, number of stop bits) of 8-N-1, 7-N-2, 7-1-1, by
default. Modes of 8-1-1, 8-N-2, 7-1-2 are acceptable with 9-bit mode enabled.
Embedded Wireless Solutions Support Center:
http://ews-support.lairdtech.com
www.lairdtech.com/ramp
Baud (0X42)
Minimum Interface Timeout
0x0A
0x09
0x08
0x07
0x06
0x05
0x04
0x03
0x02
0x01
0x00
0xE3
Table
2, the following equations can be used:
(256 + BAUD_M * (2
___________________________________
Baud Rate
© Copyright 2017 Laird. All Rights Reserved
1
(0X58)
0x02
0x02
0x02
0x02
0x03
0x05
0x07
0x10
0x15
0x2A
0x53
Use equation below
BAUD_E
) * FREQUENCY
28
2
100000
_______
Table
2. To enable a non-standard baud rate,
7
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