UPSD3313DV-40T6 datasheet(13/231 Pages) STMICROELECTRONICS

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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

3.3VCC for the MCU Module and 5.0VDD 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 VOH of 2.4V min and VCC 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 VCC

and VDD. 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

VCC for MCU

Module

VDD for PSD

Module

Ports 3 and 4 on

MCU Module

Ports A, B, C, and D on

PSD Module

5V:

uPSD33xx

3.3V

5.0V

3.3V but 5V tolerant

3.3V:

uPSD33xxV

3.3V

3.3V but 5V tolerant

3.3V. NOT 5V tolerant

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