The Cyrustek 51919 is used in LCR meters. The chip takes no commands, and continually outputs 17-byte packets structured as described below.
| Byte
|
Description
|
| 0-1
|
Header, always 0x00 0x0d
|
| 2
|
Flags
| 0
|
hold enabled
|
| 1
|
reference shown (in delta mode)
|
| 2
|
delta mode
|
| 3
|
calibration mode
|
| 4
|
sorting mode
|
| 5
|
LCR mode
|
| 6
|
auto mode
|
| 7
|
parallel measurement (vs. serial)
|
|
| 3
|
Configuration
| 0-4
|
unknown
|
| 5-7
|
test frequency
|
|
|
0 100 Hz
|
|
|
1 120 Hz
|
|
|
2 1 KHz
|
|
|
3 10 KHz
|
|
|
4 100 KHz
|
|
|
5 0 Hz (DC)
|
|
| 4
|
Tolerance (sorting mode)
| 0
|
not set
|
| 3
|
±0.25%
|
| 4
|
±0.5%
|
| 5
|
±1%
|
| 6
|
±2%
|
| 7
|
±5%
|
| 8
|
±10%
|
| 9
|
±20%
|
| 10
|
-20+80%
|
|
| 5-9
|
Primary measurement
|
| 10-14
|
Secondary measurement
|
| 15-16
|
Footer, always 0x0d 0x0a
|