
TL/DD11214
C
8
August 1996
COP688EG/COP684EG/COP888EG/COP884EG/
COP988EG/COP984EG 8-Bit Microcontroller
with UART and Three Multi-Function Timers
General Description
The COP8
TM
feature family of microcontrollers use an 8-bit
single-chip core architecture fabricated with National Semi-
conductor’s
M
2
CMOS
TM
COP888EG/COP884EG are members of this expandable
8-bit core processor family of microcontrollers. (Continued)
process
technology.
The
Key Features
Y
Full duplex UART
Y
Three 16-bit timers, each with two 16-bit registers
supporting
D Processor Independent PWM mode
D External Event counter mode
D Input Capture mode
Y
Quiet design (low radiated emissions)
Y
8k bytes on-board ROM
Y
256 bytes on-board RAM
Additional Peripheral Features
Y
Idle Timer
Y
Multi-Input Wake-Up (MIWU) with optional interrupts (8)
Y
Two analog comparators
Y
WATCHDOG
TM
and clock monitor logic
Y
MICROWIRE/PLUS
TM
serial I/O
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 ports G and L
Y
Packages:
D 28 SO or 28 DIP, each with 24 I/O pins
D 40 DIP with 36 I/O pins
D 44 PQFP with 40 I/O pins
D 44 PLCC with 40 I/O pins
CPU/Instruction Set Features
Y
1
m
s instruction cycle time
Y
Fourteen multi-source vectored interrupts servicing
D External Interrupt with selectable edge
D Idle Timer T0
D Three Timers (each with 2 Interrupts)
D MICROWIRE/PLUS
D Multi-Input Wake-Up
D Software Trap
D UART (2)
D Default VIS (default interrupt)
Y
Versatile and easy to use instruction set
Y
8-bit Stack Pointer (SP) stack in RAM
Y
Two 8-bit Register Indirect Data Memory Pointers
(B and X)
Fully Static CMOS
Y
Two power saving modes: HALT and IDLE
Y
Low current drain (typically
k
1
m
A)
Y
Single supply operation: 2.5V to 6.0V
Y
Temperature ranges: 0
§
C to
a
70
§
C,
b
40
§
C to
a
85
§
C,
b
55
§
C to
a
125
§
C
Development Support
Y
Emulation and OTP devices
Y
Real time emulation and full program debug offered by
MetaLink Development System
Block Diagram
TL/DD/11214–1
FIGURE 1. Block Diagram
TRI-STATE
é
is a registered trademark of National Semiconductor Corporation.
MICROWIRE/PLUS
TM
, M
2
CMOS
TM
, COPS
TM
microcontrollers, MICROWIRE
TM
and WATCHDOG
TM
are trademarks of National Semiconductor Corporation.
IBM
é
, PC
é
, PC-AT
é
and PC-XT
é
are registered trademarks of International Business Machines Corporation.
iceMASTER
TM
is a trademark of MetaLink Corporation.
C
1996 National Semiconductor Corporation
RRD-B30M106/Printed in U. S. A.
http://www.national.com