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COP8SE Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No. de Pieza. COP8SE
Descripción  8-Bit CMOS ROM Based and OTP Microcontrollers with 4k Memory and 128 Bytes EERAM
Descarga  47 Pages
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Fabricante  NSC [National Semiconductor (TI)]
Página de inicio  http://www.national.com
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COP8SE Datasheet(HTML) 3 Page - National Semiconductor (TI)

 
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1.0 Device Description (Continued)
memory to the CPU. This instruction can be used for table
lookup and to read the entire program memory for checksum
calculations.
RETSK: (Return Skip); Single byte instruction allows return
from subroutine and skips next instruction. Decision to
branch can be made in the subroutine itself, saving code.
AUTOINC/DEC: (Auto-Increment/Auto-Decrement); These
instructions use the two memory pointers B and X to effi-
ciently process a block of data (analogous to “FOR NEXT” in
higher level languages).
1.2.3 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.
1.2.4 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-maped registers allow de-
signers to optimize the precise implementation of certain
specific instructions.
1.3 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. Microcontrol-
ler users try to avoid using large packages to get the I/O
needed. Large packages take valuable board space and in-
crease 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: up to 90.9% (or 40 pins in the 44-pin pack-
age, these packages are not available on all COP8 devices)
are devoted to useful I/O.
Connection Diagrams
DS100973-6
Top View
Order Number COP8SEC516M
See NS Package Number M16B
DS100973-43
Top View
Order Number COP8SEC520M or COP8SER720M
See NS Package Number M20B
FIGURE 2. Connection Diagrams
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