AS3661 datasheet(58/87 Pages) AMSCO

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AS3661

Datasheet - D e t a i l e d D e s c r i p t i o n

8.10.18 LED TEST ADC

CONTINUOUS

_CONV

R/W

When EN_LED_TEST_ADC bit is set to”1”, it is possible to

enable a continuous conversation setting the

CONTINUOUS_CONV bit to “1” in this register.

0: continuous conversion is disabled.

1: continuous LED test measurement. Not active in powersave

mode.

4:0

LED_TEST_CTRL

0 0000

R/W

These bits are used for choosing the LED driver output to be

measured with the LED test ADC. In addition to the LED

outputs is is possible to measure VDD , INT-pin and charge-

pump output voltage as well.

0 0000: LED1

0 0001: LED2

0 0010: LED3

0 0011: LED4

0 0100: LED5

0 0101: LED6

0 0110: LED7

0 0111: LED8

0 1000: LED9

0 1001 to 0 1110: reserved, do not use

0 1111: VCP

1 0000: VBAT

1 0001: INT-pin

10010 to 11111: reserved, do not use

Table 53. LED TEST ADC Register

LED TEST ADC

Bit

Bit Name

Default

Access

Bit Description

7:0

LED_TEST_ADC

N/A

This is used to store the LED test result. Read-only register.

LED test ADC least significant bit corresponds to 30mV. The

measured voltage V (typ.) is calculated as follows: V =

(RESULT(DEC) x 0.03 - 1.478 V. For example, if the result is

10100110 = 166(DEC), the measured voltage is 3.50V

(typ.)(see Figure 28 on page 58).

Table 52. LED TEST CONTROL Register

LED TEST CONTROL

Bit

Bit Name

Default

Access

Bit Description

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