ADA4254ARUZ-R7 datasheet(45/59 Pages) AD

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Data Sheet

ADA4254

Rev. B | Page 45 of 59

DIGITAL ERROR REGISTER (DIGITAL_ERR) DETAILS

Table 16. DIGITAL_ERR Register Details (Register 0x03)

Bit Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Reserved

CAL_BUSY

SPI_CRC_ERR

SPI_RW_ERR

SPI_SCLK_CNT_ERR

Reserved

MM_CRC_ERR

ROM_CRC_ERR

Access

Reserved

Reset

Reserved

Bit 6, CAL_BUSY—Calibration Busy (Read Only)

CAL_BUSY indicates that the PGIA is undergoing a calibration

and self trim operation. Until this flag is clear, the ADA4254

output is not accurate. Writing a 1 or 0 to CAL_BUSY has no

effect. CAL_BUSY can be output on GPIO2 when GPIO2 is

configured as an output using the corresponding GPIO_DIR

bit and when the CAL_BUSY_OUT bit is set to 1.

Bit 5, SPI_CRC_ERR—SPI CRC Error

The SPI_CRC_ERR error flag indicates that an error occurred

during SPI communication with the ADA4254. This error

occurs when the user provided CRC does not match the

ADA4254 CRC calculation. Clear this error flag by writing

a 1 to the SPI_CRC_ERR bit.

Bit 4, SPI_RW_ERR—SPI Read/Write Error

The SPI_RW_ERR error flag indicates that a SPI read/write

operation is attempted on an invalid address. This error flag

can be cleared by writing a 1 to this bit.

Bit 3, SPI_SCLK_CNT_ERR—SPI SCLK Count Error

The SPI_SCLK_CNT_ERR error flag indicates that, during SPI

communication while CS is low, the number of SCLK edges is

either insufficient or excessive. This error flag can be cleared by

writing a 1 to this bit.

Bit 1, MM_CRC_ERR—Memory Map CRC Error

The MM_CRC_ERR error flag indicates that the current internal

memory map does not match the result from the previous SPI

write. If this error occurs, it is recommended to reprogram the

ADA4254 registers. This error flag can be cleared by writing a 1

to this bit.

Bit 0, ROM_CRC_ERR—ROM CRC Error

The ROM_CRC_ERR error flag indicates that the internal

ROM did not pass the CRC check. If this error occurs, it is

strongly recommended to reset or power cycle the device. If

the error does not reset with a power cycle or a soft reset, it is

possible that the device is permanently damaged.

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