64 EMBEDDED SYSTEMS
reception. Serial communication with a baud rate as decided by the register settings and
processor clock frequency, is possible with this communication setup.
More sophisticated MCUs have other communication ports as well. You may see
ports and peripheral controllers for protocols like SPI, I2C, bluetooth, USB, etc., for
some of the advanced MCUs like ARM, PIC, etc. e principles of these protocols are
dealt with, in Chapter 5.
2.3 | Memory for Embedded Systems
In general purpose computing systems, memory is outside the processor chip. Consider
a PC with a Pentium processor. It has primary memory in the form of RAM and ROM,
which are on the motherboard of the PC, but outside the processor. But for an embed-
ded processor ...