AS3643 datasheet(22/34 Pages) AMSCO

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AS3643

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

Table 6. ChipID Register

Addr: 0

ChipID Register

This register has a fixed ID

Bit

Bit Name

Default Access

Description

2:0

version

AS3643 chip version number

7:3

fixed_id

10110b

This is a fixed identification (e.g. to verify the I

communication)

Table 7. Current Set1 Register

Addr: 1

Current Set1 Register

This register defines design versions

Bit

Bit Name

Default Access

Description

7:0

led_current

9Ch

R/W

Define the current on pin LED_OUT1/2 (combined; each

current sink has identical currents)assist mode uses bits 6:0

of this current setting (max. half of full current setting)

indicator or low current pwm mode uses only 5:0 of this

current setting (max. 1/4 of full current setting)

Caution:

Always write same content to this register

Current Set1 (1h) and Current Set2 (2h)

0mA

5.1mA

10.2mA

...

3Fh

321.2mA (maximum current for indicator or low

current pwm mode, mode_setting=01)

...

7Fh

647.5mA (maximum current for assist light mode,

mode_setting=10)

...

9Ch

795.3mA - default setting

...

FEh

1295mA

FFh

1300mA

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