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MPC821ADS, Revision A - User’s Manual
Support Information
"******************************************************************************
"* Hard reset configuration
"******************************************************************************
equations
ResetConfig~.oe = H;
DriveConfig~.oe = H;
"* Configuration hold counter. Since the rise time of the HARD RESET signal
"* is relatively slow, there is a need to provide a hold time for reset
"* configuration.
ConfigHold.clk = SYSCLK;
when (SyncHardReset~.fb & !ConfigHoldEnd.fb) then ConfigHold := ConfigHold.fb +1;
else when (SyncHardReset~.fb & ConfigHoldEnd.fb) then ConfigHold := ConfigHold.fb;
else when (!SyncHardReset~.fb) then ConfigHold := 0;
ConfigHoldEnd = (ConfigHold.fb == HARD_CONFIG_HOLD_VALUE); " terminal count
!ResetConfig~ = !HardReset~;" drives RSTCONF~ to pda
!DriveConfig~ = !ConfigHoldEnd.fb; " drives configuration data on the bus.
"******************************************************************************
"* NMI generation
"******************************************************************************
equations
NMI~.oe = NMIEn;
NMI~ = 0;" O.D.
NMIEn = !RstDeb1.fb & AbrDeb1.fb;" only abort button depressed
"******************************************************************************
"* local data buffers enable
"******************************************************************************
equations
137
Release 1.3a