LED7708 STMicroelectronics, LED7708 Datasheet - Page 30

• Manufacturer Part Number: LED7708
• Description: LED Lighting Drivers 16 Ch 85mA LED 3.6 to 36V 250kHz
• Manufacturer: STMicroelectronics

Specifications of LED7708

• Rohs: yes

Recommended operating conditions
8.5.3
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Internal registers access
The LED7708 is capable of supporting different data formats to satisfy different application
needs. The control registers are accessed one at a time by using 16-bit read/write
operations, while the brightness registers can be loaded in sequence (16x16-bit) or in a
single shot (1x256-bit). An additional data format (1x192-bit) allows data flow optimization
when only 12 bits are used for brightness control.
data format is set by default.
DEVCFGx registers.
Table 12.
1. The content of the shift register is loaded into DEVCFG0 or DEVCFG1 according to the DEST bit (the most
Figure 8.
significant bit, common to both registers). The data bits are shifted in starting from the most significant one
(MSB first).
DCLK rising edges with LE=1
Internal register operations encoding
Timing diagram related to a DEVCFGx write operation
10-11
12-13
Table 12
2-3
4-5
6-7
8-9
1
Figure 8
Doc ID 022698 Rev 1
summarizes the available operations:
details the signal timing for a write operation to the
After the startup
Global latch (BRTxx)
Data latch (BRTxx)
Read DEVCFGx (1)
Write DEVCFGx(*)
Write CHSEL
Read CHSTA
Write GSLAT
Operation
sequence, the 16x16-bit
LED7708