UPSD33XX Datasheet, PDF (13/231 Pages) STMicroelectronics – Fast 8032 MCU with Programmable Logic

uPSD33xx
uPSD33xx HARDWARE DESCRIPTION
The uPSD33xx has a modular architecture built
from a stacked die process. There are two die, one
is designated “MCU Module” in this document, and
the other is designated “PSD Module” (see Figure
5., page 14). In all cases, the MCU Module die op-
erates at 3.3V with 5V tolerant I/O. The PSD Mod-
ule is either a 3.3V die or a 5V die, depending on
the uPSD33xx device as described below.
The MCU Module consists of a fast 8032 core, that
operates with 4 clocks per instruction cycle, and
has many peripheral and system supervisor func-
tions. The PSD Module provides the 8032 with
multiple memories (two Flash and one SRAM) for
program and data, programmable logic for ad-
dress decoding and for general-purpose logic, and
additional I/O. The MCU Module communicates
with the PSD Module through internal address and
data busses (A8 – A15, AD0 – AD7) and control
signals (RD, WR, PSEN, ALE, RESET).
There are slightly different I/O characteristics for
each module. I/Os for the MCU module are desig-
nated as Ports 1, 3, and 4. I/Os for the PSD Mod-
ule are designated as Ports A, B, C, and D.
For all 5V uPSD33xx devices, a 3.3V MCU Module
is stacked with a 5V PSD Module. In this case, a
5V uPSD33xx device must be supplied with
3.3V_CC for the MCU Module and 5.0V_DD for the
PSD Module. Ports 3 and 4 of the MCU Module
are 3.3V ports with tolerance to 5V devices (they
can be directly driven by external 5V devices and
they can directly drive external 5V devices while
producing a V_OH of 2.4V min and V_CC max). Ports
A, B, C, and D of the PSD Module are true 5V
ports.
For all 3.3V uPSD33xxV devices, a 3.3V MCU
Module is stacked with a 3.3V PSD Module. In this
case, a 3.3V uPSD33xx device needs to be sup-
plied with a single 3.3V voltage source at both V_CC
and V_DD. I/O pins on Ports 3 and 4 are 5V tolerant
and can be connected to external 5V peripherals
devices if desired. Ports A, B, C, and D of the PSD
Module are 3.3V ports, which are not tolerant to
external 5V devices.
Refer to Table 3 for port type and voltage source
requirements.
80-pin uPSD33xx devices provide access to 8032
address, data, and control signals on external pins
to connect external peripheral and memory devic-
es. 52-pin uPSD33xx devices do not provide ac-
cess to the 8032 system bus.
All non-volatile memory and configuration portions
of the uPSD33xx device are programmed through
the JTAG interface and no special programming
voltage is needed. This same JTAG port is also
used for debugging of the 8032 core at runtime
providing breakpoint, single-step, display, and
trace features. A non-volatile security bit may be
programmed to block all access via JTAG inter-
face for security. The security bit is defeated only
by erasing the entire device, leaving the device
blank and ready to use again.
Table 3. Port Type and Voltage Source Combinations
Device Type
V_CC for MCU
Module
V_DD for PSD
Module
Ports 3 and 4 on
MCU Module
5V:
uPSD33xx
3.3V
5.0V
3.3V but 5V tolerant
3.3V:
uPSD33xxV
3.3V
3.3V
3.3V but 5V tolerant
Ports A, B, C, and D on
PSD Module
5V
3.3V. NOT 5V tolerant
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