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PSD834F2V Flash在系统可编程(ISP)的外设对8位微控制器

The PSD8XXFX family of memory systems for microcontrollers (MCUs) brings In-System-Programmability (ISP) to Flash memory and programmable logic. The result is a simple and flexible solution for embedded designs. PSD devices combine many of the peripheral functions found in MCU based applications.

Table 1 summarizes all the devices in the PSD834F2, PSD853F2, PSD854F2.

The CPLD in the PSD devices features an optimized macrocell logic architecture. The PSD macrocell was created to address the unique requirements of embedded system designs. It allows direct connection between the system address/ data bus, and the internal PSD registers, to simplify communication between the MCU and other supporting devices.

The PSD device includes a JTAG Serial Programming interface, to allow In-System Programming (ISP) of the entire device. This feature reduces development time, simplifies the manufacturing flow, and dramatically lowers the cost of field upgrades. Using ST’s special Fast-JTAG programming, a design can be rapidly programmed into the PSD in as little as seven seconds.

The innovative PSD8XXFX family solves key problems faced by designers when managing discrete Flash memory devices, such as:

– First-time In-System Programming (ISP) – Complex address decoding – Simultaneous read and write to the device.

The JTAG Serial Interface block allows In-System Programming (ISP), and eliminates the need for an external Boot EPROM, or an external programmer. To simplify Flash memory updates, program execution is performed from a secondary Flash memory while the primary Flash memory is being updated. This solution avoids the complicated hardware and software overhead necessary to implement IAP.

ST makes available a software development tool, PSDsoft Express, that generates ANSI-C compliant code for use with your target MCU. This code allows you to manipulate the non-volatile memory (NVM) within the PSD. Code examples are also provided for:

PSD834F2V 特性:
PSD834F2V 技术支持与电子电路设计开发资源下载
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