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AS3665
Datasheet, Confidential - D e t a i l e d D e s c r i p t i o n A n a l o g t o D i g i t a l C o n v e r t e r
The ADC is controlled by:
Table 42. ADC_Control Register
Addr: 09h
ADC_Control Register
Bit
Bit Name
Default Access
Description
0h Audio Buffer - see section Audio Input on page 34 input
Select ADC channel to be converted
(uses pin INT/AUDIO_IN and audio
amplifier )
ADC TEMPCODE
1h
2h
3h
1
don’t use
INT/AUDIO_IN
4h
GPO
2
5h
VBAT
3:0
adc_select
0h
R/W
6h
7h
VOUT
LED1
8h
9h
Ah
Bh
Ch
Dh
Eh
Fh
LED2
LED3
LED4
LED5
LED6
LED7
LED8
LED9
Enable ADC continuous conversion
5
adc_continuous
1b
R/W
0
1
no continuous conversion
ADC is continuously converting. If a conversion is
finished an interrupt can be sent (register bit adc_eoc
on page 37 )
select ADC conversion time
6
adc_slow
1b
R/W
0
16μs ADC conversion time
1
32μs ADC conversion time
7
adc_single_conversion
0b
W
writing ‘1’ starts a single ADC conversion. If a conversion is
finished an interrupt can be sent (register bit adc_eoc )
1. Set temp_sens_on (see page 24) =1 before the measurement
2. set gpo_signal =1 and gpo_mode =01 to switch pad GPO into tristate
The ADC result is stored in registers adc<9:3> and adc<2:0> ; a running conversion is identified by result_not_ready :
Table 43. ADC_MSB_Result Register
Addr: 0Ah
ADC_MSB_Result Register
Bit
Bit Name
Default Access
Description
6:0
adc<9:3>
NA
R
ADC Result bits 9:3 (MSBs)
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