COP424C Datasheet, PDF (1/24 Pages) National Semiconductor (TI) – Single-Chip 1k and 2k CMOS Microcontrollers

April 1992
COP424C COP425C COP426C COP324C COP325C
COP326C and COP444C COP445C COP344C COP345C
Single-Chip 1k and 2k CMOS Microcontrollers
General Description
The COP424C COP425C COP426C COP444C and
COP445C fully static Single-Chip CMOS Microcontrollers
are members of the COPS^TM family fabricated using dou-
ble-poly silicon gate microCMOS technology These Con-
troller Oriented Processors are complete microcomputers
containing all system timing internal logic ROM RAM and
I O necessary to implement dedicated control functions in a
variety of applications Features include single supply oper-
ation a variety of output configuration options with an in-
struction set internal architecture and I O scheme de-
signed to facilitate keyboard input display output and BCD
data manipulation The COP424C and COP444C are 28 pin
chips The COP425C and COP445C are 24-pin versions (4
inputs removed) and COP426C is 20-pin version with 15 I O
lines Standard test procedures and reliable high-density
techniques provide the medium to large volume customers
with a customized microcontroller at a low end-product cost
These microcontrollers are appropriate choices in many de-
manding control environments especially those with human
interface
The COP424C is an improved product which replaces the
COP420C
COPSTM MicrobusTM and MICROWIRETM are trademarks of National Semiconductor Corp
TRI-STATE is a registered trademark of National Semiconductor Corp
Features
Y _{Lowest power dissipation (50 mW typical)}
Y _{Fully static (can turn off the clock)}
Y _{Power saving IDLE state and HALT mode}
Y _{4 ms instruction time plus software selectable clocks}
Y _{2k x 8 ROM 128 x 4 RAM (COP444C COP445C)}
Y _{1k x 8 ROM 64 x 4 RAM (COP424C COP425C}
COP426C)
Y _{23 I O lines (COP444C and COP424C)}
Y _{True vectored interrupt plus restart}
Y _{Three-level subroutine stack}
Y _{Single supply operation (2 4V to 5 5V)}
Y _{Programmable read write 8-bit timer event counter}
Y _{Internal binary counter register with MICROWIRE}TM
serial I O capability
Y _{General purpose and TRI-STATE outputs}
Y _{LSTTL CMOS output compatible}
Y _MicrobusTM _compatible
Y _{Software hardware compatible with COP400 family}
Y _{Extended temperature range devices COP324C}
COP325C COP326C and COP344C COP345C (b40 C
to a85 C)
Y _{Military devices (}b_{55 C to} a_{125 C) to be available}
Block Diagram
C1995 National Semiconductor Corporation TL DD 5259
FIGURE 1
Not available on COP426C COP326C
TL DD 5259 – 1
RRD-B30M105 Printed in U S A