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PDF UCOM-4 Data sheet ( Hoja de datos )
| Número de pieza | UCOM-4 | |
| Descripción | 4-BIT SINGLE CHIP MICROCOMPUTER FAMILY | |
| Fabricantes | NEC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de UCOM-4 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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NEe Microcomputers, Inc.
NEe
JI. COM-4
4-81T SINGLE CHIP MICROCOMPUTER FAMILY
DEseR IPTION
The J,lCOM-4 4-bit Microcomputer Family is a broad product line of 14 individual
devices designed to fulfill a wide variety of design criteria_ The product line shares a
compatible architecture and instruction set_ The architecture includes all functional
blocks necessary for a single chip controller, including an ALU, Accumulator, Byte-
wide ROM, RAM, and Stack. The instruction set maximizes the efficient utilization
of the fixed ROM space, and includes a variety of Single Bit Manipulation, Table
Look-Up, BCD arithemetic, and Skip instructions.
The J,lCOM-4 Microcomputer Family includes seven different products capable of
directly driving 35V Vacuum Fluorescent Displays. Four products are manufactured
with a CMOS process technology.J,lCOM-4 Microcomputers are ideal for low-{;ost
general purpose controller applications such as industrial controls, instruments,
appliance controls, intelligent VF display drivers, and games.
The J,lCOM-4 Microcomputer Family can be broken down into 3 distinct groups
according to their performance capabilities. These groups are distinguished by their
ROM, RAM, and I/O capabilities, as follows.
IlCOM-4 MICRO
COMPUTER FAMILY
IlCOM-43
IlCOM-44
IlCOM-45
ROM
2000 x 8
1000 x 8
1000x8 @
RAM
96 x 4
64x4
32 x 4
I/O
35W
35
21
<DNotes:
The IlPD557L has 21 I/O lines.
@ The IlPD550 and IlPD550L have 640 x 8 ROMs.
RELATIVE
PERFORMANCE
Highest
Medium
Lowest
FEATURES • Choice of ROM size: 2000 x 8,1000 x 8, or 640 x 8
• Choice of RAM size: 96 x 4, 64 x 4, or 32 x 4
- Six 4-Bit Working Registers Available
- One 4-Bit Flag Register Available
• Powerful Instruction Set
Choice of 80 or 58 Instructions
Table Look-Up Capability with CZP and JPA Instructions
Single Bit Manipulation of RAM or I/O Ports
BCD Arithmetic Capability
• Choice of 3-Level, 2-Level, or l-Level Subroutine Stack
• Extensive I/O Capability
- Choice of 35 or 21 I/O Lines
35 Lines
21 Lines
4-Bit Input Ports
2
1
4-Bit I/O Ports
2
2
4-Bit Output Ports
4
2
3-Bit Output Ports
l-B it Output Port
• Programmable 6-Bit Timer Available
• Choice of Hardware or Testable Interrupt
• Built-In Clock Signal Generation Circuitry
• Built-In Reset Circuitry
• Single Power Supply
• Low Power Consumption
• PMOS or CMOS Technologies
• Choice of 42-pin DIP, 28-pin DIP, or 52-pin Flat Plastic Package
159
1 page  
JI. COM-4
The following abbreviations are used in the description of the /lCOM·4 instruction set:
SYMBOL
EXPLANATION AND USE
ACC
ACC n
address
Accumulator
Bit "n" of Accumulator
Immediate address
C Carry F/F
C' Carry Save F/F
data Immediate data
On Bit "n" of immediate data or immediate address
DP Data Pointer
DPH
DPL
Upper Bits of Data Pointer
-
Lower 4 Bits of Data Pointer
FLAG
FLAG Register
INTE F/F Interrupt Enable F/F
INT F/F Interrupt F/F
P( )
Parallel Input/Output Port addressed by the value within the brackets
Pn Bit "n" of Program Counter
PA Input Port A
PC Input/Output Port C
PO Input/Output Port 0
PE Output Port E
R R Register
S S Register
SKIP
Number of Bytes in next instruction when skip condition occurs
STACK Stack Register
TC 6·Bit Binary Down Timer Counter
TIMER F/F Timer F/F
W W Register
X X Register
y Y Register
Z Z Register
()
The contents of RAM addressed by the value within the brackets
[1
<-
The contents of ROM addressed by the value within the brackets
Load, Store, or Transfer
<+ Exchange
- Complement
¥ LOGICAL EXCLUSIVE OR
INSTRUCTI ON SET
SYMBOL DEFINITIONS
II
163
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet UCOM-4.PDF ] | |
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| Número de pieza | Descripción | Fabricantes |
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| UCOM-44 | 4-BIT SINGLE CHIP MICROCOMPUTER | NEC |
| UCOM-45 | 4-BIT SINGLE CHIP MICROCOMPUTER | NEC |
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