MPFS250T datasheet(112/128 Pages) MICROCHIP

112 / 128 page

Unit

Max

Typ

Symbol

Parameter

μs

4.5

TINST_PUB_INFO

1, 2

μs

2.5

TINST_ZERO_RECO

1, 2

μs

180

170

TINST_PASSCODE_FAIL

1, 2

μs

110

TINST_KEY_VAL_FAIL

1, 2

μs

TINST_UNUSED

1, 2

TCLEAR_FLAG

Time from sending the

CLEAR to deassertion on

FLAG

1. The timing does not impact the user design, but it is useful for security analysis.

2. System service requests from the fabric will interrupt the system controller delaying the generation of

the flag.

3. Timing of these depends highly on supply ramp rate.

Table 140 • Tamper Macro Response Timing Characteristics

Unit

Max

Typ

Symbol

Parameter

TIO_DISABLE

Time from triggering the

response to all I/Os dis-

abled

TCLR_IO_DISABLE

Time from negation of

RESPONSE to all I/Os re-

enabled

TLOCKDOWN

Time from triggering the

response to security

locked

TCLR_LOCKDOWN

Time from negation of

RESPONSE to earlier se-

curity unlock condition

μs

11.7

Ttr_RESET

Time from triggering the

response to device en-

ters RESET

8.2

7.4

Ttr_ZEROLISE

Time from triggering the

response to start of ze-

roization

6.9.5

System Controller Suspend Switching Characteristics

The following table describes the characteristics of system controller suspend switching.

108

Microsemi Proprietary and Confidential. DS0147 Revision 1.0

AC Switching Characteristics

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