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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 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

00

R/W

Defines operating mode for input pin TXMASK/TORCH

00

pin has no effect

01

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

LED current is set to flash_txmask_current - (see

TXMASK on page 16)

10

external torch mode: if TXMASK/TORCH=1 and

mode_setting=00, the AS3647/47B is set into external

torch mode (LED current is defined by the 7LSB

of led_current )

11

don’t use

3:2

coil_peak

10

R/W

00

01

10

11

7:4

flash_txmask_current

2

6h

R/W

Define the current on pin LED_OUT1/2 in flash mode if

ext_torch_on=01 and TXMASK/TORCH=1

0h

0mA

1h

100mA

2h

201mA

3h

301mA

4h

402mA

5h

502mA

6h

602mA - default

7h

703mA

8h

803mA

9h

904mA

Ah

1004mA

Bh

1104mA

Ch

1205mA

Dh

1305mA

Eh

1405mA

Fh

1506mA

1. The MSB bit of this register not used to protect the LED; therefore the maximum current = half the maximum

flash current

2.