PSD813F2A-70M

Overview

The PSD813F2A-70M is a Flash In-System Programmable (ISP) peripheral designed for 8-bit microcontrollers, manufactured by STMicroelectronics. It integrates dual-bank Flash memory with up to 2 Mbit of primary storage and 256 Kbit of secondary Flash, alongside up to 256 Kbit of SRAM. The device features over 3000 gates of PLD capability, including CPLD and DPLD configurations, and provides 27 reconfigurable I/O ports. It supports concurrent read/erase/write operations and includes an enhanced JTAG serial port for full-chip in-system programmability.

Feature Summary

• Dual-bank Flash architecture allowing concurrent operation: reading from one bank while erasing or writing the other.
• Integrated PLD with over 3000 gates, supporting CPLD (16 OMCs, 24 IMCs) and DPLD modes.
• Built-in JTAG compliant serial port enabling full-chip in-system programming and efficient manufacturing testing.
• 27 individually configurable I/O ports that can serve as MCU I/Os, PLD I/Os, latched address outputs, or special function I/Os.

Applications

• Flash In-System Programmable (ISP) peripherals for 8-bit MCUs
• Latched MCU address output expansion
• User-defined internal chip select decoding

Procurement Notes

Verify the package type matches the required 52-PQFP (10x10) form factor. Confirm the operating voltage requirements align with the specific system design, as variants exist for both 5V and 3.3V applications. Ensure the JTAG interface compatibility is validated for the target programming infrastructure.

Selection Notes

Select this component when expanding 8-bit MCU capabilities with non-volatile memory and logic resources. Choose based on the required Flash capacity (up to 2 Mbit primary) and the need for concurrent memory access. Verify that the 52-pin QFP package fits the PCB layout constraints and that the speed grade meets the system timing requirements.

Part Context

This part belongs to the PSD813F family of programmable peripherals from STMicroelectronics. These devices are designed to augment 8-bit microcontrollers by providing additional memory, logic, and I/O resources through a unified ISP interface. The family includes variants with different speed grades and voltage levels, such as the 5V and 3.3V versions.

Replacement Considerations

Direct substitutes within the same family include other PSD813F2 variants with different speed grades or voltage ratings, provided the pinout and electrical characteristics remain compatible. Cross-family replacements require careful verification of the PLD gate count, memory size, and I/O configuration capabilities.