LED1642GW Datasheet, PDF (16/42 Pages) STMicroelectronics – 16 channel LED driver with error detection current gain control

Digital blocks
7
Digital blocks
LED1642GW
The data input arrives through the serial Interface at each CLK rising edge. The LE signal is
used to latch the loaded data and also to address data loading to the appropriate register,
thermal flag reading and error detection. The access to the different registers or functions of
the device (configuration register, brightness register or current gain, error detection, etc.) is
achieved by using different digital keys, defined as a number of CLK pulses during which the
LE signal is asserted. The available digital keys are listed in Table 7 and Figure 8. A typical
channel data input is shown in Figure 9.
Table 7. Digital key summary
Number # CLK rising edge when the LE is “1”
Command description
1
1–2
Write switch (to turn on/off output channels)
2
3–4
Brightness data latch
3
5–6
Brightness global latch
4
7
Write configuration register
5
8
Read configuration register
6
9
Start open error detection mode
7
10
Start short error detection mode
8
11
Start combined error detection mode
9
12
End error detection mode
10
13
Thermal error reading
11
14
Reserved
12
15
Reserved
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DocID024395 Rev 6