AS3676 datasheet(37/92 Pages) AMSCO

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AS3676

Datasheet - D e ta i l e d D e s c r i p t i o n

8.4.6

LED Pattern Generator

The LED pattern generator is capable of producing a pattern with 32 bits length and 1 second duration (31.25ms for

each bit). The pattern itself can be started every second, every 2

nd, 3rd up to 7th second4.

With this pattern all current sinks can be controlled. The pattern itself switches the configured current sources between

0 and their programmed current.

If everything else is switched off, the current consumption in this mode is IACTIVE. (excluding current through switched

on current source) and the charge pump, if required. The charge pump can be automatically switched on/off depending

on the pattern (set register cp_auto_on on page 20=1) to reduce the overall current consumption.

LED pattern start/stop depends on writing the pattern registers in correct order - it is recommended to use austriami-

crosystems Android driver to ensure this.

Table 47. Curr41 current

Addr: 13h

Curr41 current

This register controls the curr41 current sink current.

Bit

Bit Name

Default Access

Description

7:0

curr41_current

0R/W

Defines current into Current sink CURR41

00h

0 mA

01h

0.15 mA

....

FFh

38.25 mA

Table 48. Curr42 current

Addr: 14h

Curr42 current

This register controls the curr42 current sink current.

Bit

Bit Name

Default Access

Description

7:0

curr42_current

0R/W

Defines current into Current sink CURR42

00h

0 mA

01h

0.15 mA

....

FFh

38.25 mA

Table 49. Curr43 current

Addr: 15h

Curr43 current

This register controls the curr43 current sink current.

Bit

Bit Name

Default Access

Description

7:0

curr43_current

0R/W

Defines current into Current sink CURR43

00h

0 mA

01h

0.15 mA

....

FFh

38.25 mA

4. All times can be extended by a factor of 8 by setting pattern_slow=1 (this result in a delay of up to 56s)

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