PSD813F1A-90UI

Overview

The PSD813F1A-90UI is a Flash in-system programmable (ISP) peripheral for 8-bit MCUs, manufactured by STMicroelectronics. It integrates 1 Mbit of Primary Flash Memory and 256 Kbit of Secondary EEPROM, alongside 16 Kbit of SRAM. The device features over 3,000 gates of PLD logic, including DPLD and CPLD with 16 Output Macrocells (OMCs) and 24 Input Macrocells (IMCs). It provides 27 reconfigurable I/O ports and supports an enhanced JTAG serial port for full-chip ISP. The component operates on a single 5 V supply and utilizes a 64-LQFP package.

Feature Summary

• Dual bank memory architecture: 1 Mbit Primary Flash and 256 Kbit Secondary EEPROM allow concurrent read/write operations.
• Integrated Programmable Logic Device (PLD) with over 3,000 gates, supporting user-defined internal chip-select decoding.
• 27 individually configurable I/O pins capable of functioning as MCU I/Os, PLD I/Os, or latched address outputs.
• Built-in JTAG-compliant serial port enabling full-chip In-System Programmability without MCU participation.

Applications

• Embedded designs requiring In-System Programming (ISP) for 8-bit microcontrollers.
• Applications needing simultaneous code execution and data logging via concurrent Flash/EEPROM access.
• Systems utilizing complex memory mapping with separate program and data spaces.

Procurement Notes

Verify the specific speed grade suffix '90' against the official datasheet to confirm access timing requirements. Confirm that the 64-TQFP package matches the design footprint. Ensure the manufacturing source is STMicroelectronics, as historical records indicate distribution through other entities like Numonyx or Micron for similar PSD family members.

Selection Notes

Select this component when designing with 8-bit MCUs requiring external Flash expansion with ISP capabilities. The 5 V supply voltage requirement must align with the target system. Consider the 16 Kbit SRAM size for temporary data storage needs. Verify that the available 27 I/O ports suffice for the interface requirements between the MCU and peripheral devices.

Part Context

The PSD813F1A belongs to the PSD family of Programmable Microcontroller Peripherals from STMicroelectronics. This family is designed to simplify embedded system development by integrating Flash memory, EEPROM, and PLD logic into a single ISP-compatible device. It serves as a bridge between standard 8-bit MCUs and non-volatile memory/logic requirements.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult STMicroelectronics for current recommended replacements, as the product information indicates it may not be recommended for new designs.