LabJack U3 User Manual

5.3.17 AsynchTX
ardware version 1.21. Sends bytes to the U3 UART which will be sent
ber of asynch data bytes divided by 2. If the number
n extra zero to the packet.
bytes will be sent (0-248).
Buffer: Returns how many bytes are currently in the RX buffer.
Requires U3 h
asynchronously on the SDA terminal.
Command:
Byte
0 Checksum8
10xF8
2 1 + NumAsynchWords
30x15
4 Checksum16 (LSB)
5 Checksum16 (MSB)
60x00
7 NumAsynchBytesToSend
8 AsynchByte0
……
Response:
Byte
0 Checksum8
10xF8
20x02
30x15
4 Checksum16 (LSB)
5 Checksum16 (MSB)
6 Errorcode
7 NumAsynchBytesSent
8 NumAsynchBytesInRXBuffer
90x00
• NumAsynchWords: This is the num
of bytes is odd, round up and add a
• NumAsynchBytesToSend: Specifies how many
• NumAsynchBytesInRX
109

LabJack U3 Specifications

General

Analog Outputs	2
Analog Output Resolution	10 bits
Digital I/O	20
Counter/Timers	2
Interface	USB
Operating Voltage	5 V
Manufacturer	LabJack Corporation
Analog Inputs	16
Analog Input Resolution	12-bit
Max Sample Rate	50 kHz