MLX90821

Relative Pressure Sensor IC

Page 35 of 40

REV 004 – 4 MAR 2021

3901090821

ERROR_ENABLE

parameter

ERROR

Slow channel diagnostic

N.A.

no error

000h

-

not calibrated

nc = no change

DIAG_INT

initialization error

003h (only once when reinit passes after reset)

(Remark: in contrary to the other errors, DIAG_INT is used here to enable/disable the complete check and not only the

customized slow channel error reporting)

ERR_EN_TINT

T_INT

A05h if DIAG_INT=1, else set bit 11 & 10

ERR_EN_IO

RAM_IO_CFG

A05h if DIAG_INT=1, else set bit 11 & 9

ERR_EN_SPSN

SPSN

A05h if DIAG_INT=1, else set bit 11 & 8

ERR_EN_PV

PRESS

A05h if DIAG_INT=1, else set bit 11 & 7

ERR_EN_PP

PRESS_PAR

A05h if DIAG_INT=1, else set bit 11 & 6

ERR_EN_BW

PRESS_BROKEN_W

A05h if DIAG_INT=1, else set bit 11 & 5

ERR_EN_TMED

T_MED

A05h if DIAG_INT=1, else set bit 11 & 4

ERR_EN_TCHIP

T_CHIP

A05h if DIAG_INT=1, else set bit 11 & 0

ERR_EN_VSUPH

VSUP_HIGH

021h / 901h if DIAG_VSUP = 0 / 1, but set bit 11 & 2 if also other errors are reported in the fast channel

and if DIAG_INT=0 (if DIAG_INT=1 and other errors, then A05h)

ERR_EN_VSUPL

VSUP_LOW

020h / 900h if DIAG_VSUP = 0 / 1, but set bit 11 & 1 if also other errors are reported in the fast channel

and if DIAG_INT=0 (if DIAG_INT=1 and other errors, then A05h)

DIAG_P1

P @ FC1 =

002h if DIAG_PCL = 0 / 812h if DIAG_PCL = 1

DIAG_P1

P @ FC1 =

001h if DIAG_PCL = 0 / 811h if DIAG_PCL = 1

DIAG_P2

P @ FC1 =

002h

DIAG_P2

P @ FC1 =

001h

DIAG_T1

T @ FC2 =

005h

DIAG_T1

T @ FC2 =

004h

DIAG_T2

T @ FC2 =

805h (Remark: value 186 matches with -50 degC)

DIAG_T2

T @ FC2 =

804h (Remark: value 2266 matches with +210 degC)

Table 27: Diagnostics in slow channel