AS3687 datasheet(25/55 Pages) AMSCO

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AS3687/87XM

Datasheet

www.austriamicrosystems.com/AS3687

1v3-4

24 - 54

Addr: 03h

curr3 control

This register select the mode of the current sinks30 - 33

Bit

Bit Name

Default

Access

Description

1:0

curr30_mode

R/W

Select the mode of the current sink curr30

00b = off

01b = strobe/preview

10b = curr30_other PWM controlled

11b = curr30_current

3:2

curr31_mode

R/W

Select the mode of the current sink curr31

00b = off

01b = strobe/preview

10b = curr31_other PWM controlled

11b = curr31_current

5:4

curr32_mode

R/W

Select the mode of the current sink curr32

00b = off

01b = strobe/preview

10b = curr32_other PWM controlled

11b = curr32_current

7:6

curr33_mode

R/W

Select the mode of the current sink curr33

00b = off

01b = strobe/preview

10b = curr33_other PWM controlled

11b = curr33_current

1) don’t use this mode (11b) if softdim_pattern=1, use strobe/preview instead

Addr: 18h

Pattern control

This register controls the LED pattern

Bit

Bit Name

Default

Access

Description

curr30_pattern

R/W

Additional CURR33 LED pattern control bit

0b = CURR30 controlled according curr30_mode register

1b = CURR30 controlled by LED pattern generator

curr31_pattern

R/W

Additional CURR33 LED pattern control bit

0b = CURR31 controlled according curr31_mode register

1b = CURR31 controlled by LED pattern generator

curr32_pattern

R/W

Additional CURR33 LED pattern control bit

0b = CURR32 controlled according curr32_mode register

1b = CURR32 controlled by LED pattern generator

curr33_pattern

R/W

Additional CURR33 LED pattern control bit

0b = CURR33 controlled according curr33_mode register

1b = CURR33 controlled by LED pattern generator

7.3.3 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 or 4th second.

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 (see register cp_auto_on in the charge pump section) to reduce the overall

current consumption.

AS3687 数据表(PDF) 25 Page - ams AG

AS3687 数据表(HTML) 25 Page - ams AG

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AS3687 数据表(PDF) 25 Page - ams AG

AS3687 数据表(HTML) 25 Page - ams AG

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