
COP912C
8-Bit Microcontroller
General Description
Note:
COP8SA devices are instruction set and pinout com-
patible supersets of the COP912C devices, and are replace-
ments for these in new designs when possible.
The COP912C ROM based microcontrollers are integrated
COP8(tm) Base core devices with smaller memory (768
bytes), and fewer on-board features. These single-chip
CMOS devices are suited for lower-functionality applications
where system cost is of prime consideration. Pin and soft-
ware compatible (different Vcc range) 4k/32k OTP versions
are available (COP87LxxCJ/RJ Family). Erasable windowed
versions are available for use with a range of COP8(tm) soft-
ware and hardware development tools.
Family features include an 8-bit memory mapped architec-
ture, 10MHz CKI with 2.5us(912C) or 2us(912CH) instruction
cycle, one multi-function 16-bit timer/counter with PWM,
MICROWIRE/PLUS(tm) serial I/O, power saving HALT
mode, three clock modes, high current outputs, software se-
lectable I/O options, multi-volt operation and 20 pin pack-
ages.
Devices included in this datasheet are:
Device
Memory (bytes)
RAM
(bytes)
64
64
I/O Pins
Packages
Temperature
Comments
COP912C
COP912CH
768 ROM
768ROM
16
16
20 DIP/SOIC
20 DIP/SOIC
0 to +70C
0 to +70C
2.3v - 4.0v
4.0v - 5.5v
Key Features
n
Lowest cost COP8 microcontroller
n
16-bit multi-function timer supporting
— PWM mode
— External event counter mode
— Input capture mode
n
768 bytes of ROM
n
64 bytes of RAM
I/O Features
n
Memory mapped I/O
n
Software selectable I/O options (TRI-STATE
Output,
Push-Pull Output, Weak Pull-Up Input, High Impedance
Input)
n
Schmitt trigger inputs on Port G
n
MICROWIRE/PLUS
Serial I/O
n
Packages: 20 DIP/SO with 16 I/O pins
CPU/Instruction Set Features
n
Instruction cycle time of 2 μs for COP912CH and
2.5 μs for COP912C
n
Three multi-sourced interrupts servicing
— External Interrupt with selectable edge
— Timer interrupt
— Software interrupt
n
Versatile and easy to use instruction set
n
8-bit Stack Pointer (SP)—stack in RAM
n
Two 8-bit Register Indirect Memory Pointers (B, X)
Fully Static CMOS
n
Low current drain (typically
<
1 μA)
n
Single supply operation: 2.3V to 4.0V or 4.0V to 5.5V
n
Temperature range: 0C to +70C
Development Support
n
Emulation and OTP devices
n
Real time emulation and full program debug offered by
MetaLink Development System
Applications
n
Electronic keys and switches
n
Remote Control
n
Timers
n
Alarms
n
Small industrial control units
n
Low cost slave controllers
n
Temperature meters
n
Small domestic appliances
n
Toys and games
TRI-STATE
is a registered trademark of National Semiconductor Corporation.
COP8
, MICROWIRE/PLUS
, WATCHDOG
and MICROWIRE
are trademarks of National Semiconductor Corporation.
PC
is a registered trademark of International Business Machines Corp.
iceMaster
is a trademark of MetaLink Corporation.
August 2000
C
2000 National Semiconductor Corporation
DS012060
www.national.com