mpc82x54a Megawin Technology, mpc82x54a Datasheet - Page 59
mpc82x54a
Manufacturer Part Number
mpc82x54a
Description
8-bit Micro-controller
Manufacturer
Megawin Technology
Datasheet
1.MPC82X54A.pdf
(74 pages)
- Current page: 59 of 74
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MEGAWIN
Reset and Boot Entrance
There could be five conditions will cause the device to be reset.
The following procedure describes how does this device select the boot entrance.
Power-Up
RST-pin press
The RST pin is used to reset this device. It is connected into the device to a Schmitt
Trigger buffer to get excellent noise immunity.
Any positive pulse from RST pin must be kept at least 10us plus 36 oscillation cycles, or
the device cannot be reset.
WDT overflow, LVD reset, and Software reset
If (HWBS2==0) then
else
end
If (SWBS==1) {
else
If ( (HWBS==0) or (HWBS2==0) ) then
else
end
If (SWBS==1) {
else
SWBS keeps unchanged
If (SWBS==1) {
else
end
d
SWBS = 1
SWBS keeps unchanged
Boot from ISP code
Boot from AP code
Power-Up
RST pin press
Watch Dog Timer overflows
Reset from Low-Voltage-Detector
Software invokes
SWBS = 1
SWBS keeps unchanged
Boot from ISP code
Boot from AP code
Boot from ISP code
Boot from AP code
MPC82x54A Data Sheet
59
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