STE12PS datasheet(6/44 Pages) STMICROELECTRONICS

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Pin description

STE12PS

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Table 2.

Digital pins description

Pin name

I/O

Function

Reset

RESETN

Reset pin. Active LOW

Status flag interface

CH_SELn

Channel identification “n”, where n = 1,… 12. Indicates the channel whose

status flags (POK, …) are currently notified externally. CH_SEL is incremented

every 60 * MCLK clock cycles. The status flag notification is enabled via the

configuration register Global_cfg2, STATUS_FLAG_EN bit.

POK

Power OK flag. This flag indicates condition of the currently powered channel:

‘1’

→power ON and NO faults are present

‘0’

→power OFF or (power ON and faults present)

OVLD

Overload Alarm Flag for the currently powered channel. Current overload

condition (Icut is over threshold):

‘1’

→channel overload condition detected

‘0’

→NO overload

OVCUR

Short circuit Alarm Flag for the currently powered channel. Current limiting

condition:

‘1’

→Overcurrent or detection failed condition detected

‘0’

→ANY Short Circuit condition detected

AC_DC_DISCON

AC/DC Disconnection Alarm Flag for the currently powered channel:

‘1’

→AC/DC disconnection detected

‘0’

→ANY disconnection detected

DET_CLASS

Detection/Classification flag.

‘1’

→Detection or Classification procedure is running

‘0’

→Detection/Classification procedure is not running.

Por_N

‘1’

→VL, 10V and 3.3V supply Power ON succeeded

Thermal monitoring

T_MONITOR

Thermal monitoring (x = 0,1).

These bits encode the internal temperature’s threshold measured in the

following way:

“00”

→Temperature under 110° C

“01”

→Temperature between the 110° C to 130° C

“11”

→Temperature between the 130° C to 150° C

“10”

→Temperature is above 150° C

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