Overview
The PSD4235G2V-90U is a Programmable Peripherals IC designed by STMicroelectronics, specifically tailored for 16-bit Microcontroller (MCU) applications. This integrated circuit offers a comprehensive solution that includes configurable memories, Programmable Logic Device (PLD) logic, and I/O ports. Although this product is now obsolete, it was highly versatile and integrated various functionalities to support complex MCU-based systems.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Supply Voltage | 3.3 V ±10% |
| Maximum Operating Frequency | 32.2 MHz |
| Minimum Operating Temperature | 0°C |
| Maximum Operating Temperature | +70°C |
| Primary Flash Memory | 4 Mbit (8 uniform sectors, 32K x 16) |
| Secondary Flash Memory | 256 Kbit (4 sectors) |
| SRAM | 64 Kbit |
| PLD Gates | Over 3000 gates |
| I/O Ports | 7 ports with 52 individually configurable I/O pins |
| Package Type | LQFP80 (U) 80-lead, Thin, Quad, Flat |
| Memory Access Time | 90 ns for Flash memory and SRAM |
Key Features
- Dual bank Flash memories with concurrent operation: read from one memory while erasing and writing the other.
- 64 Kbit SRAM for additional data storage.
- Programmable Logic Device (PLD) with over 3000 gates, including CPLD and DPLD, and 16 output macrocells (OMCs) and 24 input macrocells (IMCs).
- Seven I/O ports with 52 individually configurable I/O pins that can be used for MCU I/Os, PLD I/Os, latched MCU address output, special function I/Os, and more.
- In-system programming (ISP) via JTAG port, allowing full-chip programmability and efficient manufacturing testing.
- Internal page register to expand the microcontroller address space by a factor of 256.
- Programmable power management and high endurance with 100,000 erase/write cycles for Flash memory and 1,000 erase/write cycles for PLD.
- 15-year data retention for Flash memory.
Applications
The PSD4235G2V-90U is designed for use in 16-bit MCU-based applications. It is particularly suitable for systems that require integrated memory solutions, programmable logic, and flexible I/O configurations. This includes industrial control systems, automotive electronics, medical devices, and other embedded systems where programmability and flexibility are crucial.
Q & A
- What is the primary function of the PSD4235G2V-90U?
The PSD4235G2V-90U is a Programmable Peripherals IC designed to provide integrated memory, programmable logic, and I/O solutions for 16-bit MCU applications.
- What are the key memory components of the PSD4235G2V-90U?
The device includes 4 Mbit of primary Flash memory, 256 Kbit of secondary Flash memory, and 64 Kbit of SRAM.
- What is the operating supply voltage of the PSD4235G2V-90U?
The operating supply voltage is 3.3 V ±10%.
- What is the maximum operating frequency of the PSD4235G2V-90U?
The maximum operating frequency is 32.2 MHz.
- Does the PSD4235G2V-90U support in-system programming?
Yes, it supports in-system programming (ISP) via a JTAG port.
- What is the package type of the PSD4235G2V-90U?
The package type is LQFP80 (U) 80-lead, Thin, Quad, Flat.
- Is the PSD4235G2V-90U still in production?
No, the PSD4235G2V-90U is an obsolete product and is no longer manufactured.
- What are the endurance specifications of the Flash memory and PLD?
The Flash memory has 100,000 erase/write cycles, and the PLD has 1,000 erase/write cycles.
- What is the data retention period for the Flash memory?
The Flash memory has a 15-year data retention period.
- How many I/O ports and pins does the PSD4235G2V-90U have?
The device has 7 I/O ports with 52 individually configurable I/O pins.
