Overview
The PSD835G2-90U, manufactured by STMicroelectronics, is a Flash Programmable System Device (PSD) designed for use with 8-bit microcontrollers (MCUs). This integrated circuit combines multiple functionalities, including Flash memory, SRAM, and programmable logic, making it a versatile solution for embedded system designs. The device features in-system programmability (ISP) via JTAG, enhancing manufacturing efficiency and product testing. It is packaged in an 80-pin LQFP (Low Profile Quad Flat Package) and operates within a single supply voltage range of 4.5 to 5.5 V.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Part Number | PSD835G2-90U |
| Package | 80-LQFP |
| Memory Type | Non-Volatile Flash |
| Memory Size | 4 Mbit (512K x 8) + 256 Kbit secondary Flash + 64 Kbit SRAM |
| Access Time | 90 ns |
| Supply Voltage | 4.5 V ~ 5.5 V |
| Operating Temperature | 0°C ~ 70°C (TA) |
| Mounting Type | Surface Mount |
| PLD Gates | Over 3000 gates |
| I/O Ports | 52 reconfigurable I/O ports |
Key Features
- In-system programmable (ISP) Flash memory and programmable logic via JTAG
- Dual bank Flash memories: 4 Mbits primary Flash and 256 Kbits secondary Flash
- 64 Kbit SRAM
- Concurrent operation: READ from one memory while erasing and writing the other
- Programmable Logic Device (PLD) with over 3000 gates, including CPLD and DPLD
- 52 individually configurable I/O port pins
- Internal page register to expand microcontroller address space
- Programmable power management and low standby current (as low as 50 µA)
- High endurance: 100,000 Erase/WRITE cycles for Flash, 1,000 cycles for PLD, and 15-year data retention
Applications
The PSD835G2-90U is suitable for a wide range of embedded system applications, including:
- Industrial control systems
- Automotive electronics
- Consumer electronics
- Medical devices
- Telecommunication equipment
Its integrated Flash memory, SRAM, and programmable logic make it an ideal choice for applications requiring flexible and reliable memory solutions.
Q & A
- What is the primary function of the PSD835G2-90U?
The PSD835G2-90U is a Flash Programmable System Device that integrates Flash memory, SRAM, and programmable logic for use with 8-bit microcontrollers.
- What is the memory configuration of the PSD835G2-90U?
The device features 4 Mbits of primary Flash memory, 256 Kbits of secondary Flash memory, and 64 Kbit SRAM.
- What is the access time of the PSD835G2-90U?
The access time is 90 ns for Flash memory and SRAM.
- What is the supply voltage range for the PSD835G2-90U?
The supply voltage range is 4.5 V to 5.5 V.
- How many I/O ports does the PSD835G2-90U have?
The device has 52 reconfigurable I/O ports.
- What is the endurance of the Flash memory in the PSD835G2-90U?
The Flash memory has an endurance of 100,000 Erase/WRITE cycles.
- Does the PSD835G2-90U support in-system programming?
Yes, it supports in-system programming via JTAG.
- What is the operating temperature range of the PSD835G2-90U?
The operating temperature range is 0°C to 70°C.
- What type of package does the PSD835G2-90U come in?
The device is packaged in an 80-pin LQFP.
- What are some typical applications of the PSD835G2-90U?
Typical applications include industrial control systems, automotive electronics, consumer electronics, medical devices, and telecommunication equipment.
