ZAMC4100 datasheet(25/156 Pages) RENESAS

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ZAMC4100 Datasheet

January 26, 2016

1.3.4.

System Power-up Timing

Refer to Figure 1.3 and Table 1.17 for the definitions of the power-up and reset timing parameters.

Table 1.17 System Power-up and Reset Timing Parameters

Parameter

Symbol

Min.

Typ.

Max.

Unit

Power-on-reset (POR) hold time

tHDPOR

µs

Power-up timer delay

tPWRT

0.32

0.78

1.24

MCU supply check time

tMSC

1.1

1.66

2.5

Charge pump voltage settling time

tCP_STL

MCU reset pulse duration generated by the watchdog

timer (WDT)

tMCU_RST

µs

System reset pulse duration generated by WDT

tSYS_RST

0.4

0.95

1.5

Time window in which the valid flags for both MCU supplies are expected. For more information, refer to section 3.1.

The charge pump is considered as settled when the ZAMC4100 supply voltage is in the nominal operating range specified by parameter VSUP (see

Table 1.4).

Parameters calculated for the typical value of OSCL frequency.

Figure 1.3 ZAMC4100 System Power-Up Sequence

porb

PORHYST

Vfall

Vrise

rstn

VDDE

TYP

tPWRT

tHDPOR

Analog

Circuitry

SETTLING

STABLE

SETTLING

UNSUP

tPWRT

Charge

Pump

SUPLIED

SETTLING

STABLE

UNSUP

SUPPLIED

SETTLING

STABLE

tCP_STL

PORTH

tCP_STL

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