PSD813F1A-90U

Overview

The PSD813F1A-90U is a Flash in-system programmable (ISP) peripheral for 8-bit MCUs, operating at 5 V. It integrates 1 Mbit Primary Flash Memory and 256 Kbit Secondary EEPROM, allowing concurrent read/write operations. The device includes 16 Kbit SRAM and over 3,000 PLD gates with 16 Output Macrocells (OMCs) and 24 Input Macrocells (IMCs). It features 27 reconfigurable I/Os and an enhanced JTAG serial port for full-chip ISP. The unit supports a page register to expand the MCU address space by a factor of 256 and offers standby current as low as 50 µA.

Feature Summary

• Dual bank Flash memories: 1 Mbit Primary Flash and 256 Kbit Secondary EEPROM with concurrent operation capability.
• Programmable Logic Device (PLD): Over 3,000 gates including DPLD for chip-select decoding and CPLD with 16 OMCs and 24 IMCs.
• Enhanced JTAG Serial Port: Built-in IEEE 1149.1 compliant interface enabling full-chip In-System Programmability without MCU participation.
• Page Register: Internal mechanism to expand the microcontroller address space by a factor of 256.

Applications

• In-System Programming (ISP) for embedded designs
• In-Application Programming (IAP) for field firmware updates
• Simplifying peripheral circuit design for 8-bit MCUs

Procurement Notes

Verify package type TQFP64 against the specific ordering suffix. Confirm RoHS compliance status if required for the application. Check for obsolete status warnings as the product may not be recommended for new designs.

Selection Notes

Select this component when designing with 8-bit MCUs requiring integrated Flash, EEPROM, and PLD resources. Ensure the system voltage matches the 5 V ± 10% requirement. Consider the 64-pin TQFP package dimensions for PCB layout constraints.

Part Context

This part belongs to the PSD813F1A family of Programmable System Devices from STMicroelectronics. These devices are designed to simplify embedded MCU designs by integrating memory and logic peripherals directly onto the board, reducing component count and assembly complexity.

Replacement Considerations

Consult official documentation for direct substitutes. Verify pin compatibility and electrical specifications before replacing.

FAQ

Can the PSD813F1A be programmed while soldered to the circuit board?

Yes, it supports In-System Programming (ISP) via a built-in JTAG-compliant serial port, allowing programming without removing the device.

What is the endurance rating for the Flash memory?

The Flash memory has an endurance of 100,000 Erase/Write cycles.

How does the device handle simultaneous read and write operations?

It allows concurrent operation where the MCU can read from one memory block (Flash or EEPROM) while erasing and writing to the other.