PIC16F506T-ESLASHMCSQTP datasheet(54/116 Pages) MICROCHIP

54 / 116 page

PIC12F510/16F506

DS41268C-page 52

Preliminary

9.1.5

SLEEP

This ADC does not have a dedicated ADC clock, and

therefore, no conversion in Sleep is possible. If a

conversion is underway and a Sleep command is

executed, the GO/DONE and ADON bit will be cleared.

This will stop any conversion in process and power-

down the ADC module to conserve power. Due to the

nature of the conversion process, the ADRES may con-

tain a partial conversion. At least 1 bit must have been

converted prior to Sleep to have partial conversion data

in ADRES. The ADCS and CHS bits are reset to their

default condition; ANS<1:0> = 11 and CHS<1:0> = 11.

• For accurate conversions, TAD must meet the

following:

•500 ns < TAD < 50

μs

•TAD = 1/(FOSC/divisor)

Shaded areas indicate TAD out of range for accurate

conversions. If analog input is desired at these

frequencies, use INTOSC/4 for the ADC clock source.

TABLE 9-2:

TAD FOR ADCS SETTINGS WITH VARIOUS OSCILLATORS

TABLE 9-3:

EFFECTS OF SLEEP ON ADCON0

Source

ADCS

<1:0>

Divisor

MHz

8MHz 4MHz 1MHz

500

kHz

350

kHz

200

kHz

100

kHz

32 kHz

INTOSC

—

—.5

μs1 μs

—

FOSC

μs

.25

μs.5 μs1 μs4 μs8 μs11 μs20 μs40 μs

125

μs

FOSC

μs.5 μs1 μs2 μs8 μs16 μs23 μs40 μs

μs

250

μs

FOSC

μs1 μs2 μs4 μs16 μs32 μs46 μs

μs 160 μs 500 μs

ANS1

ANS0

ADCS1

ADCS0

CHS1

CHS0

GO/DONE

ADON

Entering

Sleep

Unchanged Unchanged

111

100

Wake or

Reset

111

100

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