Data Sheet

ADP1660

Rev. 0 | Page 19 of 28

Table 14. GPIO and Timer Register (Register 0x02)

Bits

Bit Name

Access

Description

7

LED_SD

R/W

This bit configures the shutdown function for LED1 and LED2.

0 = enter shutdown after LED1 or LED2 flash or torch ends (default).

1 = do not enter shutdown after LED1 or LED2 flash or torch ends.

6

TEST_SR

R/W

Test mode only. This bit must be set to its default value, 1. Do not set this bit to 0.

[5:4]

IO_CFG

R/W

These bits configure the GPIO pin.

00 = high impedance (default).

01 = torch mode.

10 = TxMASK operation mode.

11 = torch mode without the 8 ms deglitch filter.

[3:0]

FL_TIM

R/W

These bits set the flash timer value.

0000 = 100 ms.

0001 = 200 ms.

…

0100 = 500 ms.

…

0110 = 700 ms.

…

1001 = 1000 ms.

…

1100 = 1300 ms.

…

1111 = 1600 ms (default).

Table 15. Additional Features Register (Register 0x03)

Bits

Bit Name

Access

Description

7

CL_SOFT

R/W

This bit enables or disables the soft inductor peak current limit.

0 = enable soft inductor peak current limit.

1 = disable soft inductor peak current limit (default). The ADP1660 is disabled when the inductor

peak current limit is reached.

6

DYN_OVP

R/W

This bit enables or disables dynamic OVP.

0 = disable dynamic OVP (default).

1 = enable dynamic OVP.

5

SW_LO

R/W

This bit sets the switching frequency.

0 = 3 MHz (default).

1 = 1.5 MHz.

4

FREQ_FB

R/W

This bit enables or disables frequency foldback to 1.5 MHz.

0 = disable frequency foldback (default).

1 = enable frequency foldback.

[3:1]

IL_DC

R/W

These bits set the input dc current limit. (Bit 0 must be set to 1.)

000 = 1.0 A.

001 = 1.25 A.

010 = 1.5 A.

011 = 1.75 A.

100 = 2.0 A (default).

101 = 2.25 A.

110 = 2.5 A.

111 = 2.75 A.

0

IL_DC_EN

R/W

This bit enables or disables the input dc current limit function.

0 = disable input dc current limit (default).

1 = enable input dc current limit.