RPC56EL60L5BFSR datasheet(113/137 Pages) STMICROELECTRONICS

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RPC56EL60L5

Electrical characteristics

136

3.19.2

Reset sequence description

The figures in this section show the internal states of the chip during the five different reset

sequences. The doted lines in the figures indicate the starting point and the end point for

which the duration is specified in Table 30. The start point and end point conditions as well

as the reset trigger mapping to the different reset sequences is specified in Section 3.19.3.

With the beginning of DRUN mode the first instruction is fetched and executed. At this point

application execution starts and the internal reset sequence is finished.

The figures below show the internal states of the chip during the execution of the reset

sequence and the possible states of the signal pin RESET.

Note:

RESET is a bidirectional pin. The voltage level on this pin can either be driven low by an

external reset generator or by the chip internal reset circuitry. A high level on this pin can

only be generated by an external pull up resistor which is strong enough to overdrive the

weak internal pull down resistor. The rising edge on RESET in the following figures indicates

the time when the device stops driving it low. The reset sequence durations given in table

Table 30 are applicable only if the internal reset sequence is not prolonged by an external

reset generator keeping RESET asserted low beyond the last PHASE3.

Figure 12. Destructive Reset Sequence, BIST enabled

Figure 13. Destructive Reset Sequence, BIST disabled

PHASE3

BIST

PHASE1,2

PHASE0

PHASE1,2

PHASE3

Establish IRC

and PWR

Flash init

Device

Config

Self Test

Setup

DRUN

LBIST

MBIST

Flash init

Device

Config

Application

Execution

TDRB, min < TReset < TDRB, max

Reset Sequence Start Condition

Reset Sequence Trigger

RESET_B

RESET

PHASE3

PHASE1,2

PHASE0

Establish IRC

and PWR

Flash init

Device

Config

DRUN

Application

Execution

TDR, min < TReset < TDR, max

Reset Sequence Trigger

Reset Sequence Start Condition

RESET_B

RESET

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