TMS570LS datasheet(74/107 Pages) TI1

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TMS570LS20206-EP, TMS570LS20216-EP

SPNS209A – JUNE 2012 – REVISED AUGUST 2012

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7.3.2

Switching Characteristics Over Recommended Operating Conditions For RST

Table 7-7. Switching Characteristics Over Recommended Operating Conditions For RST(1)(2)

Parameter

MIN

MAX

Unit

tv(RST)

Valid time, RST active after PORRST inactive

1048c(OSC)

Valid time, RST active (all others)

8tc(VCLK)

(1)

Specified values do NOT include rise/fall times. For rise and fall timings, see the switching characteristics for output timings versus load

capacitance table.

(2)

This parameter is characterized from -40°C to 125°C only.

7.3.3

IO Status During PORRST

IO buffer condition during power-on-reset (nPORRST is low): All I/O pins, except nRST, are configured as

High-impedance while nPORRST is low and immediately after nPORRST goes high. The FlexRay

FRAYTX1 and FRAYTX2 pins are high impedance (high-Z) while nPORRST is low, and are output high at

latest 1024 oscillator cycles after nPORRST goes high; the FlexRay FRAYTXEN1 and FRAYTXEN2 pins

are high impedance (high-Z) while nPORRST is low, and output high immediately after nPORRST goes

high.

IO pullup/pulldown condition during power-on-reset: all internal pullups and pulldowns on input pins are

disabled when nPORRST is low, and become active immediately after nPORRST goes high. Pins that are

listed with "programmable" have programmable pullups or pulldowns. The default value after reset is listed

underneath "programmable" in the following table. The exceptions are nPORRST, nRST, nTRST and

TEST pins. The pulls on these pins will be active during power-on-reset.

Peripheral and Electrical Specifications

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