AS3677 datasheet(56/68 Pages) AMSCO

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AS3677

Datasheet - D e ta i l e d D e s c r i p t i o n

The ov_temp flag can only be reset by first writing a 1 and then a 0 to the register bit rst_ov_temp.

Bit ov_temp_on = 1 activates temperature supervision Table 95. It is recommend to leave this bit set (default state).

8.10 Serial Interface

The AS3677 is controlled using serial interface pins CLK and DATA:

Figure 30. Serial interface block diagram

Table 94. Overtemperature Detection

Symbol

Parameter

Condition

Min

Typ

Max

Unit

T140

ov_temp Rising

Threshold

140

ºC

THYST

ov_temp Hysteresis

ºC

Table 95. Overtemp control

Addr: 29h

Overtemp control

This register reads and resets the overtemperature flag.

Bit

Bit Name

Default Access

Description

ov_temp_on

Activates/deactivates device temperature supervision.

Default: Off - all other bits are only valid if this bit is set to 1

Temperature supervision is disabled. No reset

will be generated if the device temperature

exceeds 140ºC

Temperature supervision is enabled

ov_temp

N/A

Indicates that the overtemperature threshold

has been reached; this flag is not cleared by an

overtemperature reset. It has to be cleared

using rst_ov_temp

rst_ov_temp

0R/W

The ov_temp flag is cleared by first setting this bit to 1, and

then setting this bit to 0.

AS3677

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