AD7293 datasheet(39/79 Pages) AD

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Data Sheet

AD7293

Rev. D | Page 39 of 79

Table 33. Digital Input/Output Function Register (Register 0x12)

Bit Number(s)

Bit Name

Description

[D15:D8]

Reserved

Pin 6

0: LDAC (default)

1: GPIO7

Pin 4

0: SLEEP1 (default)

1: GPIO6

Pin 3

0: SLEEP0 (default)

1: GPIO5

Pin 2

0: ALERT1 (default)

1: GPIO4

Pin 53

0: ALERT0

1: GPIO3 (default)

Pin 54

0: BUSY

1: GPIO2 (default)

Pin 55

0: CONVST

1: GPIO1 (default)

Pin 56

0: IS BLANK

1: GPIO0 (default)

Table 34. Digital Functional Polarity Register (Register 0x13)

Bit Number(s)

Bit Name

Description

[D15:D8]

Reserved

LDAC

0: LDAC is active high

1: LDAC is active low (default)

SLEEP1

0: SLEEP1 is active high (default)

1: SLEEP1 is active low

SLEEP0

0: SLEEP0 is active high (default)

1: SLEEP0 is active low

ALERT1

0: ALERT1 is active high

1: ALERT1 is active low (default)

ALERT0

0: ALERT0 is active high (default)

1: ALERT0 is active low

BUSY

0: BUSY is active high (default)

1: BUSY is active low

CONVST

0: CONVST is active high (default)

1: CONVST is active low

IS BLANK

0: IS BLANK is active high (default)

1: IS BLANK is active low

Table 35. General Register (Register 0x14)

Bit Number(s)

Bit Name

Description

[D15:D8]

Reserved

ADC_REF

0: external reference (default)

1: internal reference

GPIO ALERT1 routing

0: feature disabled (default)

1: GPIO0 to GPIO3 status routed to ALERT1 if configured as general-purpose input

[D5:D4]

MISO speed

00: maximum (default)

01: fast

10: slow

11: minimum

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