ATA8743-PXQW【PDF 167/238 页】MCU W/TRANSMITTER ASK/FSK 24QFN

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Sheet目录52

163页 164页 165页 166页 [167页]168页 169页 170页 171页

167

9152BINDCO02/10

ATA8743

Notes: 1. See Table 25-5 on page 168 for details.

2. Temperature Measurement on page 165

3. For offset calibration only .See Table 25-5 on page 168 and ADC Operation on page 155

See Table 25-5 on page 168 for details of selections of differential input channel selections as

well as selections of offset calibration channels. MUX0 bit works as a gain selection bit for differ-

ential channels shown in Table 25-5 on page 168. When MUX0 bit is cleared (0) 1x gain is

selected and when it is set (1) 20x gain is selected. For normal differential channel pairs MUX5

bit work as a polarity reversal bit. Togling of the MUX5 bit exchanges the positive and negative

channel other way a round.

For offset calibration purpose the offset of the certain differential channels can be measure by

selecting the same input for both negative and positive input. This calibration can be done for

ADC0, ADC3 and ADC7. ADC Operation on page 155 describes offset calibration in a more

detailed level.

Table 25-4. Single Ended Input channel Selections.

Single Ended Input

MUX5..0

ADC0 (PA0)

000000

ADC1 (PA1)

000001

ADC2 (PA2)

000010

ADC3 (PA3)

000011

ADC4 (PA4)

000100

ADC5 (PA5)

000101

ADC6 (PA6)

000110

ADC7 (PA7)

000111

Reserved for differential channels

(1)

001000 - 011111

0V (AGND)

100000

1.1V (I Ref)

100001

ADC8

(2)

100010

Reserved for offset calibration

(3)

100011 - 100111

Reserved for reversal differential channels

(1)

101000 - 111111

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