
TL/DD12060
C
August 1996
COP912C/COP912CH 8-Bit Microcontroller
General Description
The COP912C/COP912CH are members of the COP8
TM
8-bit MicroController family. They are fully static Microcon-
trollers, fabricated using double-metal silicon gate micro-
CMOS technology. These low cost MicroControllers are
complete microcomputers containing all system timing, in-
terrupt logic, ROM, RAM, and I/O necessary to implement
dedicated control functions in a variety of applications. Fea-
tures include an 8-bit memory mapped architecture,
MICROWlRE
TM
serial I/O, a 16-bit timer/counter with cap-
ture register and a multi-sourced interrupt. Each I/O pin has
software selectable options to adapt the device to the spe-
cific application. The device operates over voltage ranges
from 2.3V to 4.0V (COP912C) and from 4.0V to 5.5V
(COP912CH). High throughput is achieved with an efficient,
regular instruction set operating at a minimum of 2
m
s per
instruction rate.
Key Features
Y
Lowest cost COP8 microcontroller
Y
16-bit multi-function timer supporting
D PWM mode
D External event counter mode
D Input capture mode
Y
768 bytes of ROM
Y
64 bytes of RAM
I/O Features
Y
Memory mapped I/O
Y
Software selectable I/O options (TRI-STATE
é
Output,
Push-Pull Output, Weak Pull-Up Input, High Impedance
Input)
Y
Schmitt trigger inputs on Port G
Y
MICROWIRE/PLUS
TM
Serial I/O
Y
Packages: 20 DIP/SO with 16 I/O pins
CPU/Instruction Set Features
Y
Instruction cycle time of 2
m
s for COP912CH and
2.5
m
s for COP912C
Y
Three multi-sourced interrupts servicing
D External Interrupt with selectable edge
D Timer interrupt
D Software interrupt
Y
Versatile and easy to use instruction set
Y
8-bit Stack Pointer (SP)Dstack in RAM
Y
Two 8-bit Register Indirect Memory Pointers (B, X)
Fully Static CMOS
Y
Low current drain (typically
k
1
m
A)
Y
Single supply operation: 2.3V to 4.0V or 4.0V to 5.5V
Y
Temperature range: 0
§
C to
a
70
§
C
Development Support
Y
Emulation and OTP devices
Y
Real time emulation and full program debug offered by
MetaLink Development System
Applications
Y
Electronic keys and switches
Y
Remote Control
Y
Timers
Y
Alarms
Y
Small industrial control units
Y
Low cost slave controllers
Y
Temperature meters
Y
Small domestic appliances
Y
Toys and games
Block Diagram
TL/DD/12060–1
TRI-STATE
é
is a registered trademark of National Semiconductor Corporation.
COP8
TM
, MICROWIRE/PLUS
TM
, WATCHDOG
TM
and MICROWIRE
TM
are trademarks of National Semiconductor Corporation.
PC
é
is a registered trademark of International Business Machines Corp.
iceMaster
TM
is a trademark of MetaLink Corporation.
C
1996 National Semiconductor Corporation
RRD-B30M96/Printed in U. S. A.
http://www.national.com