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COP404C Datasheet(PDF) 16 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # COP404C
Description  COP404C ROMless CMOS Microcontrollers
PDF  18 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

COP404C Datasheet(HTML) 16 Page - National Semiconductor (TI)

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Emulation
The COP404C may be used to exactly emulate the
COP444C445C
COP424C425C
and COP410C411C
However the Program Counter always addresses 2k of ex-
ternal ROM whatever chip is being emulated
Figure 14
shows the interconnect to implement a hardware emulation
This connection uses a NMC27C16 EPROM as external
memory Other memory can be used such as bipolar PROM
or RAM
Pins IP7 – IP0 are bidirectional inputs and outputs When the
ADDATA clocking output turns on the EPROM drivers are
disabled and IP7 – IP0 output addresses The 8-bit latch
(MM74C373) latches the addresses to drive the memory
TLDD5530 – 14
FIGURE 14 COP404C Used To Emulate A COP444C
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