PSD842F2-A-15U View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

PSD842F2-A-15U

Flash In-System Programmable (ISP) Peripherals For 8-bit MCUs

STMicroelectronics 

Preliminary Information

PSD9XX Family

2.0

Key Features

t A simple interface to 8-bit microcontrollers that use either multiplexed or

non-multiplexed busses. The bus interface logic uses the control signals generated by

the microcontroller automatically when the address is decoded and a read or write is

performed. A partial list of the MCU families supported include:

• Intel 8031, 80196, 80186, 80C251

• Motorola 68HC11, 68HC16, 68HC12, and 683XX

• Philips 8031 and 8051XA

• Zilog Z80, Z8, and Z180

t Internal 1 or 2 Mbit flash memory. This is the main Flash memory. It is divided into

eight equal-sized blocks that can be accessed with user-specified addresses.

t Internal secondary 256 Kbit Flash memory. It is divided into four equal-sized

blocks that can be accessed with user-specified addresses. This secondary memory

brings the ability to execute code and update the main Flash concurrently.

t 16, 64 or 256 Kbit SRAM. The SRAM’s contents can be protected from a

power failure by connecting an external battery.

t General Purpose PLD (GPLD) with 19 outputs. The GPLD may be used to implement

external chip selects or combinatorial logic function.

t Decode PLD (DPLD) that decodes address for selection of internal memory blocks.

t 27 individually configurable I/O port pins that can be used for the following functions:

• MCU I/Os

• PLD I/Os

• Latched MCU address output

• Special function I/Os.

• 16 of the I/O ports may be configured as open-drain outputs.

t Standby current as low as 50 µA for 5 V devices.

t Built-in JTAG compliant serial port allows full-chip In-System Programmability (ISP).

With it, you can program a blank device or reprogram a device in the factory or the

field.

t Internal page register that can be used to expand the microcontroller address space by

a factor of 256.

t Internal programmable Power Management Unit (PMU) that supports a low power

mode called Power Down Mode. The PMU can automatically detect a lack of

microcontroller activity and put the PSD9XX into Power Down Mode.

t Erase/Write cycles:

• Flash memory – 100,000 minimum

• PLD – 1,000 minimum

• Data Retention: 15 years

3

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