MPC821 datasheet(149/242 Pages) NXP

149 / 242 page

Support Information

MPC8XXFADS Design Specification—Rev 0.1

PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE

Reset = 0;" open drain

RstDeb1 = !( Rst1 & (!( RstDeb1.fb & Rst0) ) );

" Reset push-button debouncer

AbrDeb1 = !( Abr1 & (!( AbrDeb1.fb & Abr0) ) );

" Abort push-button debouncer

HardResetEn = RstDeb1.fb & AbrDeb1.fb " both buttons are depressed;

# REGULAR_POWER_ON_RESET;

SoftResetEn = RstDeb1.fb & !AbrDeb1.fb;" only reset button depressed

"******************************************************************************

"* Power On reset configuration

"******************************************************************************

equations

Modck.oe = ModckOe;

ModckOe = DRIVE_MODCK_TO_PDA;

Modck2 = L;

@ifndef SLOW_32K_LOCK {

Modck2 = ModIn;" support for 1:513 (32KHz crystal) or

Modck1 = ModIn;" 1:5 (5MHz clock gen.) via CLK4IN

}

@ifdef SLOW_32K_LOCK {

Modck2 = !ModIn;" support for 1:1 or 1:5 from CLK4IN only

Modck1 = H;" no support for 32K oscillator.

}

"******************************************************************************

"* Hard reset configuration

"******************************************************************************

equations

ResetConfig~.oe = H;

DriveConfig~.oe = H;

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

MPC821 데이터시트(PDF) 149 Page - NXP Semiconductors