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)
I/O Pins
Packages
Temperature
Comments
COP912C
768 ROM
64
16
20 DIP/SOIC
0 to +70C
2.3v - 4.0v
COP912CH
768ROM
64
16
20 DIP/SOIC
0 to +70C
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
TM
Serial I/O
n
Packages: 20 DIP/SO with 16 I/O pins
CPU/Instruction Set Features
n
Instruction cycle time of 2 s for COP912CH and
2.5 s 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 A)
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
TM
, MICROWIRE/PLUS
TM
, WATCHDOG
TM
and MICROWIRE
TM
are trademarks of National Semiconductor Corporation.
PC
is a registered trademark of International Business Machines Corp.
iceMaster
TM
is a trademark of MetaLink Corporation.
August 2000
COP912C
8-Bit
Microcontroller
2000 National Semiconductor Corporation
DS012060
www.national.com
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (V
CC
)
6.0V
Voltage at Any Pin
-0.3V to V
CC
+0.3V
Total Current into V
CC
Pin (Source)
80 mA
Total Current out of GND Pin (Sink)
80 mA
Storage Temperature Range
-65C to +150C
Note 1:
Absolute maximum ratings indicate limits beyond which damage to
the device may occur. DC and AC electrical specifications are not ensured
when operating the device at absolute maximum ratings.
DC Electrical Characteristics
COP912C/COP912CH; 0C
T
A
+70C unless other specified
Parameter
Conditions
Min
Typ
Max
Units
Operating Voltage
912C
2.3
4.0
V
912CH
4.0
5.5
V
Power Supply Ripple 1 (Note 2)
Peak to Peak
0.1 V
CC
V
Supply Current (Note 3)
CKI = 4 MHz
V
CC
= 5.5V, tc = 2.5 s
6.0
mA
CKI = 4 MHz
V
CC
= 4.0V, tc = 2.5 s
2.5
mA
HALT Current
V
CC
= 5.5V, CKI = 0 MHz
<
1
8
A
INPUT LEVELS (V
IH
, V
IL
)
Reset, CKI:
Logic High
0.9 V
CC
V
Logic Low
0.1 V
CC
V
All Other Inputs
Logic High
0.7 V
CC
V
Logic Low
0.2 V
CC
V
Hi-Z Input Leakage/TRI-STATE Leakage
V
CC
= 5.5V
-2
+2
A
Input Pullup Current
V
CC
= 5.5V
250
A
G-Port Hysteresis
0.05 V
CC
0.35 V
CC
V
Output Current Levels
Source (Push-Pull Mode)
V
CC
= 4.0V, V
OH
= 3.8V
0.4
mA
V
CC
= 2.3V, V
OH
= 1.8V
0.2
mA
Sink (Push-Pull Mode)
V
CC
= 4.0V, V
OL
= 1.0V
4.0
mA
V
CC
= 2.3V, V
OL
= 0.4V
0.7
mA
Allowable Sink/Source Current Per Pin
3
mA
Input Capacitance (Note 4)
7
pF
Load Capacitance on D2 (Note 4)
1000
pF
Note 2: Rate of voltage change must be less then 0.5 V/ms.
Note 3: Supply current is measured after running 2000 cycles with a square wave CKI input, CKO open, inputs at rails and outputs open.
Note 4: Characterized, not tested.
DS012060-2
FIGURE 1. MICROWIRE/PLUS Timing
COP912C
www.national.com
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