PSD813F2A-90MI

Overview

The PSD813F2A-90MI is a Programmable System Device (PSD) from STMicroelectronics, designed as an in-system programmable peripheral for 8-bit microcontrollers. It integrates Flash memory, SRAM, and PLD logic into a single chip to simplify embedded system design. The device features dual-bank Flash memories allowing concurrent read/erase/write operations, up to 256 Kbit of battery-backed SRAM, and over 3000 gates of PLD logic with macrocells. It includes 27 reconfigurable I/O ports and a JTAG-compliant serial port for full-chip in-system programming. The component is housed in a 52-pin PQFP package.

Feature Summary

• Dual-bank Flash memory architecture supporting concurrent operation: reading from one bank while erasing or writing to the other.
• Integrated PLD with over 3000 gates, featuring 16 output macrocells (OMCs) and 24 input macrocells (IMCs) for complex logic decoding.
• Built-in JTAG-compliant serial port enabling full-chip In-System Programmability (ISP) for efficient manufacturing testing and programming.
• 27 individually configurable I/O ports that can function as MCU I/Os, PLD I/Os, latched address outputs, or special function I/Os.

Applications

• Peripheral integration for 8-bit microcontroller systems
• In-system programming and testing of embedded devices
• Complex address decoding and logic replacement in industrial control

Procurement Notes

Verify the specific suffix 'MI' against official STMicroelectronics documentation to confirm pinout compatibility and temperature grade. Ensure the 52-PQFP package dimensions match the target PCB footprint. Confirm RoHS compliance status if required by local regulations. Cross-reference the manufacturer part number with distributor SKUs to avoid obsolete stock.

Selection Notes

Select this component when designing 8-bit MCU systems requiring integrated Flash, SRAM, and PLD logic to reduce board space and component count. The dual-bank Flash feature is critical for applications needing code execution during memory updates. Ensure the design utilizes the JTAG interface for ISP capabilities. Verify that the 27 I/O pins meet the system's connectivity requirements, noting that some may be configured as open-drain outputs.

Part Context

The PSD813 series represents STMicroelectronics' Programmable System Devices, which combine microcontroller peripherals with Flash memory and PLD logic. This family simplifies traditional MCU designs by replacing multiple discrete components such as EPROMs, RAMs, and decoders with a single integrated circuit. The PSD813F2 variant specifically targets 8-bit MCU applications, offering high-density memory and flexible logic resources.

Replacement Considerations

Check for direct substitutes within the PSD813F2 family, such as different speed grades or package options. Verify pin-to-pin compatibility before substituting. Consult STMicroelectronics for updated recommendations if the current part is discontinued.