TMP512 datasheet(39/63 Pages) TI2

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8.22 Diode_Fault (Address = 1Bh) [reset = 00h]

This register is used to indicate whether either of the remote channels have a diode improperly connected.

A diode fault is identified when diode short condition occurs. When diode short is detected on any channel,

the respective remote channel temperature conversion result gets is 0000h. Short bit in Diode_Fault is set to 1

and Alert pin is asserted (if no channel masks of both remote channels are set in Interrupt Mode). Short bit in

Diode_Fault is unset when diode short condition clears. Alert pin can be cleared by reading Diode_Fault register

and Alert Masks of both remote channels are set in both interrupt Mode and Comparator Mode, which is a

special case.

Diode open condition is identified as DP open and DN open or connected to GND. When diode open condition

occurs, the respective remote channel temperature conversion result gets is 0000h. Open bit in Diode_Fault is

set to 1 while Alert pin is NOT asserted. Open bit in Diode_Fault is unset when diode open condition clears

(diode gets connected back and a conversion happens that identifies it).

Return to Register Map.

Figure 8-22. Diode_Fault Register

Reserved

Short

Ch2_Open

Ch1_Open

Reserved

R-00h

R-0h

Table 8-24. Diode_Fault Register Field Descriptions

Bit

Field

Type

Reset

Description

7:4

Reserved

00h

Reserved

Short

This bit, when flagged to 1b, indicates remote channel 1 and(or)

remote channel 2 are(is) shorted.

Ch2_Open

This bit, when flagged to 1b, indicates remote channel 2 has a

open condition.

Ch1_Open

This bit, when flagged to 1b, indicates remote channel 1 has a

open condition.

Reserved

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TMP4719

SBOSAJ7A – OCTOBER 2025 – REVISED DECEMBER 2025

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