LED7708 datasheet(38/53 Pages) STMICROELECTRONICS

Part #	LED7708

Description	16 channels x 85 mA LED driver with boost controller and 4-wire serial interface

PDF	53 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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38 / 53 page

Recommended operating conditions

LED7708

38/53

Doc ID 022698 Rev 1

If at least one bit of the CHSTA register is asserted after the error detection sequence, the

XFLT pin is tied low. Both the CHSTA register and the XFLT pin are reset by clearing the

DEN bit of DEVCFG0 or by performing a POR.

8.5.11

Internal registers initialization

The internal registers show the following configuration after a POR.

Table 18.

CHSTA register

Bit

Position

Attribute

Meaning

CHSTA0 to CHSTA15

Read only

0= The channel is working properly or is not

used (the corresponding CHSEL bit is cleared)

1= The channel is open or an LED short-circuit

has been detected during the error detection

sequence

Table 19.

Default configuration of internal registers after POR

Value (binary)

DEVCFG0

0000 0000 0000 0010

DEVCFG1

0000 0000 0100 0000

GSLAT

0000 0000 0000 0000

BRTxx

0000 0000 0000 0000

CHSEL

0000 0000 0000 0000

CHSTA

0000 0000 0000 0000

LED7708 Datasheet(PDF) 38 Page - STMicroelectronics