AN1176 STMicroelectronics, AN1176 Datasheet - Page 23

• Manufacturer Part Number: AN1176
• Description: 68HC11/PSD813F1 DESIGN GUIDE
• Manufacturer: STMicroelectronics

4 Conclusion
These examples are just two of an endless number of ways to configure the FLASH PSD
for your system. Concurrent memories with a built-in programmable decoder at the segment
level offer excellent flexibility. Also, as you have seen with the SWAP and UNLOCK bits, the
page register bits do not have to be used just for paging through memory. The ability to grow
your system does not require any physical connection changes, as everything is configured
internal to the PSD. And finally, the JTAG channel can be used for ISP anytime, and anywhere,
with no participation from the MCU. All of these features are cross-checked under the PSDsoft
development environment to minimize your effort to design a flash 68HC11 system capable of
ISP.
5 References
1) PSD813F Family Data Sheet
2) Application Note 54 for detailed use of the JTAG channel
3) Application Note 55 for details on the CPLD and I/O pins
4) Application Note 57 for details on PSD I/O, GPLD, logic simulation, and PSDsoft features.
Page 21