DS89C420 Datasheet, PDF (1/59 Pages) Dallas Semiconductor – Ultra-High-Speed Microcontroller

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DS89C420
Ultra-High-Speed Microcontroller
www.maxim-ic.com
GENERAL DESCRIPTION
The DS89C420 offers the highest performance
available in 8051-compatible microcontrollers. It
features a redesigned processor core that executes
every 8051 instruction (depending on the instruction
type) up to 12 times faster than the original for the
same crystal speed. Typical applications see a speed
improvement of 10 times using the same code and
crystal. The DS89C420 offers a maximum crystal
speed of 33MHz, achieving execution rates up to 33
million instructions per second (MIPS).
APPLICATIONS
Data Logging
Vending
Automotive Test Equipment
Motor Control
Magstripe Reader/Scanner
Consumer Electronics
Gaming Equipment
Appliances (Washers, Microwaves, etc.)
Telephones
HVAC
Building Security and Door Access Control
Building Energy Control and Management
Uninterruptible Power Supplies
Programmable Logic Controllers
Industrial Control and Automation
ORDERING INFORMATION
PART
TEMP RANGE
MAX.
CLOCK
SPEED
(MHz)
PIN-PACKAGE
DS89C420-
MCL
0°C to +70°C
33
40 PDIP
DS89C420-
QCL
0°C to +70°C
33
44 PLCC
DS89C420-
ECL
0°C to +70°C
33
44 TQFP
Ordering information continued at end of data sheet.
FEATURES
§ 80C52 Compatible
- 8051 Pin and Instruction-Set Compatible
- Four Bidirectional I/O Ports
- Three 16-Bit Timer Counters
- 256 Bytes Scratchpad RAM
§ On-Chip Memory
- 16kB Flash Memory
- In-System Programmable through Serial Port
- 1kB SRAM for MOVX
§ ROMSIZE Feature
- Selects Internal Program Memory Size from
0 to 16k
- Allows Access to Entire External Memory
Map
- Dynamically Adjustable By Software
See page 2 for a complete list of features.
PIN CONFIGURATIONS
TOP VIEW
P1.0/T2
P1.1/T2EX
P1.2/RXD1
P1.3/TXD1
P1.4/INT2
P1.5/INT3
P1.6/INT4
P1.7/INT5
RST
P3.0/RXD0
P3.1/TXD0
P3.2/INT0
P3.3/INT1
P3.4/T0
P3.5/T1
P3.6/WR
P3.7/RD
XTAL2
XTAL1
VSS
1
40
2
39
3
38
4
37
5
36
6
35
7
34
8
33
9
32
10 DS89C420 31
11
30
12
29
13
28
14
27
15
26
16
25
17
24
18
23
19
22
20
21
DIP
VCC
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
EA/VPP
ALE/PROG
PSEN
P2.7
P2.6
P2.5
P2.4
P2.3
P2.2
P2.1
P2.0
Pin Configurations continued at end of data sheet.
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.
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