ST 可编程系统器件（PSD）-- EasyFLASH PSDST

简介：ST 可编程系统器件（PSD）-- EasyFLASH PSD

问：PSD813F和PSD9XX的价格是多少？
答： Pls contact our local sales office.

问：当应用于8051MCU时，PSD的存储器是如何从一个地址区，程序区或数据区变换到另一个地址区，程序区或数据区？

答： We designed a special VM register, VM has it own address.
the VM register is 8 bit, you just need to control this register and set different bit to "1" or "0", then you can easily define the program space or data space, you can set

问：我刚拿到了PSD的开发板和psdsoft express 7.0。
据了解还有个PSDsoft，而express版功能有所限制，
请问psdsoft是免费的吗？谢谢！
答： From the beginning of 2001, all the development software of PSD are free of charge, we improve the function of PSdsoft express to support all families of PSD, don"t worry.

right now, we already upgrade our software to 7.2 version, please go t

问：请问其内部逻辑资源如何衡量，有多少？
答： For sinple PLD PSD family(PSD9XX/PSD4135/PSD4156),
we have around 1000 gate, it can be used to replace some simple PLD such as 16V8/22V10or generate chip select

for CPLD, we have Micro-CELL, it is improved Macro-cell, gate count around 3000 ga

问：PSD 中的主Flash，次Flash和SRAM是否是多片封装？
答： No, All the Main Flash, 2nd Flash(or E2PROM) or SRAM are designed on a single die, we are not using multi-chip module,
this is also a special advance technology that STM can provide for you

问：Can you provide a sample of IAP
答： OK, We take IC card phone as example,
for the public phone, the charge rate have chance to be change, in the past, if we want to change the rate, we have to program lots of EPROM, send some body to the phone, de-assembly the public phone, replace the E

问：PSD中的读写周期是多少？是否由支持的MCU来决定？
答： The Flash of PSD can be Erase/write at least 100000 times,
of course, it can be controlled by MCU

问：在PSD中是否能同时读与写？
答： Yes,

Because we have DUal current Memory(Flash/Flash or Flash/E2PROM), we can do the read and write at the same time, we call it concurrent Flash.

问：是否在MCU没有启动之前就能用JTAG把程序写入FLASH?
答： Yes, Correct!!

This is one of the best point of using PSD, by using our Flash Link, yo can program the entire blank PSD(all function of OSD) in 10 seconds, and during the programming, we don"t need any MCU invlove.

问：9xx的Simple PLD 和8xx的CPLD在功能和使用上有什么区别？
答： OK, maybe you can review previous question,

basically, simple PLD can generate chip select and replace 16V8/22V10

But CPLD can have more cmplex feature like tr-state, shift register, and many, we have 3000 gates and some Mic-cell inside