COP8CFE9 datasheet(6/63 Pages) NSC

6 / 63 page

1.0 General Description (Continued)

1.5.4 Bit-Level Control

Bit-level control over many of the microcontroller’s I/O ports

provides a flexible means to ease layout concerns and save

board space. All members of the COP8 family provide the

ability to set, reset and test any individual bit in the data

memory address space, including memory-mapped I/O ports

and associated registers.

1.5.5 Register Set

Three memory-mapped pointers handle register indirect ad-

dressing and software stack pointer functions. The memory

data pointers allow the option of post-incrementing or post-

decrementing with the data movement instructions (LOAD/

EXCHANGE). And 15 memory-mapped registers allow de-

signers to optimize the precise implementation of certain

specific instructions.

1.6 PACKAGING/PIN EFFICIENCY

Real estate and board configuration considerations demand

maximum space and pin efficiency, particularly given today’s

high integration and small product form factors. Microcon-

troller users try to avoid using large packages to get the I/O

needed. Large packages take valuable board space and

increase device cost, two trade-offs that microcontroller de-

signs can ill afford.

The COP8 family offers a wide range of packages and does

not waste pins.

COP8CFE9 Datasheet(PDF) 6 Page - National Semiconductor (TI)