ZPSD3XX Famly
3-4
Introduction
The ZPSD3XX family is the market's first very low power single chip solution for
microcontroller-based applications where fast time-to-market, small form factor, and
low power consumption are essential criteria. When combined in an 8- or 16-bit system,
virtually any microcontroller (68HC11, 8051, 80186, etc.) and the ZPSD3XX device
work together to create a very powerful chip-set solution. The low voltage ZPSD3XXV
versions eliminate mixing and matching various discrete component low voltage
specifications. They also provide all the required control and peripheral elements needed
in a microcontroller-based system with no external discrete “glue” logic required.
The ZPSD3XX family comes complete with simple software development tools for
interfacing the ZPSD3XX to a microcontroller. Hosted on IBM PC platforms or
compatibles, the easy-to-use PSDsoft software enables the designer to quickly configure
the device and use it immediately.
The ZPSD3XX standard versions include EPROM, SRAM and features described in this
data sheet. They are ideal for general purpose embedded systems applications.
The ZPSD3XXR RAM-less versions are excellent for designs that require no on-chip SRAM
or require large off-chip SRAMs for data storage.
The ZPSD3XXV low voltage, low-power versions operate down to 2.7 volts and feature
standby current of only 1 μA typical (at 3.0 volts).
The ZPSD3XXM mask-programmable versions deliver the lowest cost ZPSD3XX
solution. See the Masked-PSD Ordering Information chapter in this databook for the
mask-programmable ZPSD3XXM ordering procedure.
References in this document to ZPSD3XX versions include any “Non-V” products
(ZPSD3XX, ZPSD3XXR, ZPSD3XXM, and ZPSD3XXRM). References to ZPSD3XXR
include any RAM-less product (ZPSD3XXR, ZPSD3XXRM, ZPSD3XXRV, ZPSD3XXRVM).
References to ZPSD3XXV include ZPSD3XXV, ZPSD3XXVM, ZPSD3XXRV and
ZPSD3XXRVM. References to ZPSD3XXM includes ZPSD3XXM, ZPSD3XXRM,
ZPSD3XXVM and ZPSD3XXRVM.
Portable and battery powered systems have recently become major embedded control
application segments. As a result, the demand for electronic components having extremely
low power consumption has increased dramatically. Recognizing this need, WSI, Inc. has
developed a new ZPSD (Zero Power PSD) technology. ZPSD products virtually eliminate
the DC component of power consumption reducing it to standby levels. Eliminating the DC
component is the basis for the words “Zero Power” in the ZPSD name. ZPSD products also
minimize the AC power component when the chip is changing states. The result is a
programmable microcontroller peripheral family that replaces at least six discrete circuit
functions while drawing much less power than a single EPROM.
ZPSD
Background