AS3665 datasheet(34/78 Pages) AMSCO

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AS3665

Datasheet, Confidential - D e taile d D e scri pti on Anal og to Digi tal Convert er

The ADC is controlled by:

The ADC result is stored in registers adc<9:3> and adc<2:0>; a running conversion is identified by result_not_ready:

Table 42. ADC_Control Register

Addr: 09h

ADC_Control Register

Bit

Bit Name

Default Access

Description

3:0

adc_select

R/W

Select ADC channel to be converted

0h Audio Buffer (uses pin INT/AUDIO_IN and audio input

amplifier - see section Audio Input on page 34)

ADCTEMPCODE

1. Set temp_sens_on (see page 24)=1 before the measurement

don’t use

INT/AUDIO_IN

GPO

2. set gpo_signal=1 and gpo_mode=01 to switch pad GPO into tristate

VBAT

VOUT

LED1

LED2

LED3

LED4

LED5

LED6

LED7

LED8

LED9

adc_continuous

R/W

Enable ADC continuous conversion

no continuous conversion

ADC is continuously converting. If a conversion is

finished an interrupt can be sent (register bit adc_eoc

on page 37)

adc_slow

R/W

select ADC conversion time

16µs ADC conversion time

32µs ADC conversion time

adc_single_conversion

writing ‘1’ starts a single ADC conversion. If a conversion is

finished an interrupt can be sent (register bit adc_eoc)

Table 43. ADC_MSB_Result Register

Addr: 0Ah

ADC_MSB_Result Register

Bit

Bit Name

Default Access

Description

6:0

adc<9:3>

ADC Result bits 9:3 (MSBs)

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