AS3647 datasheet(24/38 Pages) AMSCO

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AS3647/47B

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

AS3647/47B chip version number

7:3

fixed_id

10110b

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

communication)

Table 7. Current Set Register

Addr: 1

Current Set 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)

Caution: 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)

0mA

6.3mA

12.5mA

...

3Fh

393.3mA (maximum current for indicator or low

current pwm mode, mode_setting=01)

...

7Fh

796.9mA (maximum current for assist light mode,

mode_setting=10)

...

9Ch

979mA - default setting

...

FEh

1593.7mA

FFh

1600mA

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