which disables flash-writing authority, set SWBS 0, and trigger a software reset. After that, the
system will be reset (not powered-up), and the system will refer to SWBS to startup from AP
program entrance. For power-up procedure, the HWBS will be referred to decide the program
entrance, but for software reset, SWBS will be referred to.
Switch to the ISP program from AP program
The device also permits the user program switches directly to the ISP program. Just program
an instruction in the AP program as
ISPCR ← x11xxxxxb
which sets SWBS 1 to direct the device boot from AP program, and trigger a software reset.
After that, the system will be reset (not powered-up), and the system will refer to SWBS to
startup from ISP program entrance.
MEGAWIN
MPC89x53A Data Sheet
31
MEGAWIN [ MEGAWIN TECHNOLOGY CO., LTD ]
