VMS110
A d v a n c e d C o m p u t i n g
B l o c k D i a g r a m
O V E R V I E W
The VMS110 is a powerful
cryptographic chip designed for system
flexibility to ease secure system
implementations. VLSI provides the
user a solution for applications such as
cable access control and protection,
offering a complete security solution
for the security conscious designer.
The VMS110 is a high-speed ciphering
engine that supports the Data
Encryption Standard (DES) algorithm
as specified by the National Institute of
Standards and Technology Federal
Information Processing Standards
Publication #46-2 (FIPS PUB 46-2).
The VMS110 supports single DES
Electronic Code Book and Cipher
Block Chaining encryption/decryption.
The VMS110 uses a 16-bit bi-
directional data bus and appears as a
16-bit peripheral to the host processor.
A 5-bit address field is used as the
command input and control/status pins
are available for host processor control
and communication. The VMS 110 is a
fully static design and supports clock
rates up to 40 Mhz. Pipelined
encryption/decryption for continuous
blocks of data is implemented for both
ECB and CBC modes. The VMS110 will
complete an ECB mode in 8-clock
cycles. The VMS110 also supports
a bypass mode (plain data in with
plain data out or cipher data in with
cipher data out) which is cycle
consistent with the equivalent
encryption/ decryption mode.
Two 8-bit status and mode registers
are present for current status and
configuration/control of the VMS110.
The MODE register is used select
encrypt/decrypt modes and key usage.
The STATUS/CONFIGURATION register
is used to update the processor on the
current state of the VMS110, set bypass
mode, or select the ciphering
operational mode; Electronic
Codebook or Cipher Block Chaining.
The VMS110 key Cache consists of
(4) 56-bit write only registers which
allow for high speed key context
switching. This multi-key cache will
facilitate Single DES operations.
The VMS110 also includes VLSI
Technology's digital non-deterministic
randomizer (patent pending) for
Initialization Vector (IV) and key
generation, and random number
seeding. Random bits are generated
at greater than or equal to 1 Mbits/s.
The randomizer does not require an
external seed. The host processor can
request and read a random 64-bit
read/write status, input control, and
read/write data. The host processor
reads, writes, and configures the
VMS110 via a 5-bit address field that
is decoded by the VMS110 state
machine and decoding logic. The
VMS110 is memory mapped into the
address space. The address command
16-Bit DES C o p ro c e s s o r
set includes reading the status, writing
mode registers, loading cryptographic
Keys, and loading and unloading plain
and cipher data.
Once the VMS110 is setup, the VMS110
will automatically start a cipher process
after the last 16-bit Least Significant
Word (LSWord) is written. A start
signal is not required to start the
cipher process.
F E A T U R E S
Implements FIPS-PUB 46-2
Data Encryption Standard
(8-cycle DES)
Supports Single DES Electronic
Codebook (ECB) and Cipher-Block-
Chaining (CBC)
Programmable Bypass Mode
16 Bit Bi-directional DATA I/O Port
Simple register based control
Clock rate up to 40 Mhz
Data Throughput up to
35 M Bytes/s in Pipelined mode
Built-in non-deterministic
randomizer
Built-in 4 Key Cache for high speed
cryptographic context switching
Implemented in low power
CMOS technology
Validated and certified by the
National Institute of Standards
and Technology
A P P L I C A T I O N
Typical Applications and markets for
the VMS110 and variants as follows:
High Speed Cable Modems
Embed into PC market to vend
software and protect software privacy
Electronic commerce for MTA
or other financial applications
Network Security: ATM, Ethernet,
Internet, etc.
High speed secure communication
in general
S P E C I F I C A T I O N S
Export Control
This product is subject to U.S.
Department of State regulations. Wr i t t e n
U . S. Government approval is required
prior to export.
Package
44-pin PLCC (Plastic Leadless
Chip Carrier)
Recommended AC Operating
Conditions
Operating frequency range:
0 to 40 Mhz
Recommended DC Operating
Conditions
Supply Voltage (VDD):
5.0Vdc +/- 5%
Input Signal Levels (5V dc):
VIH: 2.4 Vdc min., VDD max.
VIL: 0.0 V min., 0.8V max.
Output Signal Levels (5V dc):
VOL: 0.3 VDD
VOH: 0.7 V min., VDD max.
Temperature Range
0 to 70 C
Storage Temperature
-65 to +80 C
Device Evaluation Kit
An Evaluation Kit for the VMS110
is available to help customers
understand the operation of the device.
The evaluation kit is hosted on the ISA
bus and consists of the following:
PC Adapter Card
Evaluation Program
Users Guide
Source Code and Associated Files
The PC adapter card fits into any
16-bit ISA bus slot of any IBM-
compatible computer. With the
evaluation program, users can
download their own code and
verify results. The program
demonstrates features of the part
and can, in fact, be used to
sencrypt or decrypt files.
Ordering Information
VMS110-EVAL: Evaluation Kit as
listed above.
VMS110: Packaged Unit (44 PLCC).
VLSI Technology, Inc.
1109 McKay Drive
San Jose, CA 95131
With respect to the information in this document, VLSI
Technology, Inc. (VLSI) makes no guarantee or warranty of
its accuracy or that the use of such information will not
infringe upon the intellectual rights of third parties. VLSI
shall not be responsible for any loss or damage of whatever
nature resulting from the use of, or reliance upon it and no
patent or other license is implied hereby. This document
does not in any way extend or modify VLSI's warranty on any
product beyond that set forth in its standard terms and con-
ditions of sale. VLSI reserves the right to make changes in its
products and specifications at any time and without notice.
LIFE SUPPORT APPLICATIONS:
V L S I 's products are not intended for use as critical
components in life support appliances, devices, or
systems, in which the failure of a VLSI product to
p e rf o rm could be expected to result in personal injury.
For update information, please visit our Web site:
h t t p : / / w w w. v l s i . c o m
1997 VLSI Technology, Inc. Printed in USA
Document Control: PB-VMS110 V1.0
October 97
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