AS3648 datasheet(24/39 Pages) AMSCO

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AS3648

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

Table 8. Current Set LED2 Register

Addr: 2

Current Set LED2 Register

This register defines LED Currents

Bit

Bit Name

Default Access

Description

7:0

led_current2

9Ch

R/W

Define the current on pin LED_OUT2 in flash mode

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

3.5mA

7.1mA

...

3Fh

222.4mA (maximum current for indicator or low

current pwm mode, mode_setting=01)

...

7Fh

448.2mA (maximum current for assist light mode,

mode_setting=10)

...

9Ch

551mA - default

...

FEh

896.5mA (996.1mA

1 if current_boost=1)

FFh

900mA (1000mA

1 if current_boost=1)

1. Do not use current_boost=1 for currents <= 900mA

Table 9. TXMask Register

Addr: 3

TXMask Register

This register defines the TXMask settings and coil peak current

Bit

Bit Name

Default Access

Description

1:0

ext_torch_on

R/W

Defines operating mode for input pin TXMASK/TORCH

pin has no effect

txmask-mode; during flash if TXMASK/TORCH=1, the

LED current is set to flash_txmask_current - (see

TXMASK on page 14)

external torch mode: if TXMASK/TORCH=1 and

mode_setting=00, the AS3648is set into external

torch mode (LED current is defined by the 7LSB

1 bits

of led_current1 and led_current2)

don’t use

3:2

coil_peak

R/W

Defines the maximum coil current (parameter ILIMIT)

ILIMIT = 2.0A

ILIMIT = 2.5A

ILIMIT = 3.0A

ILIMIT = 3.5A

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