psd934f2v-20mi STMicroelectronics, psd934f2v-20mi Datasheet - Page 7

• Manufacturer Part Number: psd934f2v-20mi
• Description: Flash In-system Programmable Isp Peripherals For 8-bit Mcus
• Manufacturer: STMicroelectronics

Preliminary Information
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Key Features
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:
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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.
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.
16, 64 or 256 Kbit SRAM. The SRAM’s contents can be protected from a
power failure by connecting an external battery.
General Purpose PLD (GPLD) with 19 outputs. The GPLD may be used to implement
external chip selects or combinatorial logic function.
Decode PLD (DPLD) that decodes address for selection of internal memory blocks.
27 individually configurable I/O port pins that can be used for the following functions:
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Standby current as low as 50 µA for 5 V devices.
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.
Internal page register that can be used to expand the microcontroller address space by
a factor of 256.
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.
Erase/Write cycles:
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Flash memory – 100,000 minimum
PLD – 1,000 minimum
Data Retention: 15 years
Intel 8031, 80196, 80186, 80C251
Motorola 68HC11, 68HC16, 68HC12, and 683XX
Philips 8031 and 8051XA
Zilog Z80, Z8, and Z180
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.
PSD9XX Family
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