AS3658F-BCTP datasheet(138/158 Pages) AMSCO

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Table 161. ADC control Registers bits

Addr:96

ADC_control

This register controls the 10 Bit ADC

Bit

Bit Name

Default

Access

Description

Table 162. ADC MSB result register

Addr:97

ADC_MSB result

This register shows the MSB result of the ADC conversion

Bit

Bit Name

Default

Access

Description

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Revision 1v13

137 - 157

AS3658

Data Sheet Confidential - Deta il ed Descri ption - System Functi ons

3:0

adc_select

0000b

R/W

Selects an ADC channel

0000

ADC1_IN (LSB = 1.76mV)

0001

ADC2_IN (LSB = 1.76mV)

0010

VBAT Battery voltage (LSB=5.27mV)

0011

VCHARGER (LSB=17. 6mV) clamping at 10V

0100

V_USB Voltage (LSB=5.27mV)

0101

not used

0110

temperature sensor:

DIE temperature [°C] = adc_result * 0.866 –

274

0111

ADC test channel – do not use

1000

check voltage on MICS for remote control or

external voltage measurement (LSB=3.52mV)

1001

VBACK voltage (LSB=3.52mV)

adc_slow

R/W

select ADC sampling frequency

275kHz (conversion time: 60µs)

70kHz (conversion time: 240µs)

reserved (do not use)

adc_on

R/W

Writing a 1 into this bit continuously activates the ADC

S/H and the input multiplexer. The ADC and the MUX

are also activated for a conversion period when

start_conversion is set to ‘1’ – useful for high

impedance input sources on ADC1_IN or ADC2_IN

start_conversion

R/W

Writing a 1 into this bit starts one ADC conversion.

ADC result register

result_not_ready

Indicates end of conversion

result is ready

conversion is running

AS3658F-BCTP Datasheet(PDF) 138 Page - ams AG

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