Quick Detail:
Flash in-system programmable (ISP) peripherals for 8-bit MCUs, 5 V
Description:
The PSD family of Programmable Microcontroller
(MCU) Peripherals 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.
PSD devices integrate an optimized “microcontroller macrocell” logic architecture. The 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 family offers two methods to program PSD Flash memory while the PSD is soldered to a circuit board.
In-System Programming (ISP) via JTAG An IEEE 1149.1 compliant JTAG interface is included on the PSD enabling the entire device
(Flash memory, EEPROM, the PLD, and all configuration) to be rapidly programmed while soldered to the circuit board. This requires no MCU
participation, which means the PSD can be programmed anytime, even while completely blank.
The innovative JTAG interface to Flash memories is an industry first, solving key problems faced by designers and manufacturing houses, such as:
First time programming. How do I get firmware into the Flash the very first time? JTAG is the answer, program the PSD while blank with no MCU involvement.
Inventory build-up of pre-programmed devices. How do I maintain an accurate count of preprogrammed Flash memory and PLD devices
based on customer demand? How many and what version? JTAG is the answer, build your hardware with blank PSDs soldered directly to the board and then custom program just before they are shipped to customer. No more labels on chips and no more wasted inventory.
Expensive sockets. How do I eliminate the need for expensive and unreliable sockets? JTAG is the answer. Solder the PSD directly to the circuit board. Program first time and subsequent times with JTAG. No need to handle devices and bend the fragile leads.
In-Application Programming (IAP)
Two independent memory arrays (Flash and EEPROM) are included so the MCU can execute code from one memory while erasing and programming the other. Robust product firmware updates in the field are possible over any communication channel (CAN, Ethernet, UART,
J1850, etc.) using this unique architecture. Designers are relieved of these problems:
Simultaneous read and write to Flash memory. How can the MCU program the same memory from which it is executing code? It cannot. The PSD allows the MCU to operate the two memories concurrently, reading code from one while erasing and programming the other during IAP.
Complex memory mapping.
I have only a 64Kbyte address space to start with. How can I map
these two memories efficiently? A Programmable Decode PLD is the answer. The concurrent PSD memories can be mapped anywhere in MCU address space, segment by segment with extremely high address resolution. As an option, the secondary Flash memory can be swapped out of the system memory map when IAP is complete. A built-in
page register breaks the 64K-byte address limit.
Separate program and data space.
How can I write to Flash or EEPROM memory while it resides in “program” space during field firmware updates, my MCU won’t allow it! The Flash PSD provides means to “reclassify” Flash or EEPROM memory
as “data” space during IAP, then back to “program” space when complete.
PSDsoft Express
PSDsoft Express, a software development tool from ST, guides you through the design process step-by-step making it possible to complete an embedded MCU design capable of ISP/IAP in just hours. Select your MCU and PSDsoft Express takes you through the remainder of the design with point and click entry, covering PSD selection, pin
definitions, programmable logic inputs and outputs, MCU memory map definition, ANSI-C code generation for your MCU, and merging your MCU firmware with the PSD design. When complete, two different device programmers are supported directly from PSDsoft Express: FlashLINK (JTAG) and PSDpro.
Applications:
â– DUAL BANK FLASH MEMORIES
– 1 Mbit of Primary Flash Memory (8 Uniform Sectors)
– 256 Kbit Secondary EEPROM (4 Uniform Sectors)
– Concurrent operation: read from one memory while erasing and writing the other
â– 16 Kbit SRAM
â– PLD WITH MACROCELLS
– Over 3,000 Gates Of PLD: DPLD and CPLD
– DPLD - User-defined Internal chip-select decoding
– CPLD with 16 Output Macrocells (OMCs) and 24 Input Macrocells (IMCs)
â– 27 RECONFIGURABLE I/Os
– 27 individually configurable I/O port pins that can be used for the following functions (16 I/O ports configurable as open-drain outputs):
MCU I/Os
PLD I/Os
Latched MCU address output; and Special function I/Os
â– ENHANCED JTAG SERIAL PORT
– Built-in JTAG-compliant serial port allows full-chip In-System Programmability (ISP)
– Efficient manufacturing allows for easy product testing and programming
â– PAGE REGISTER
– Internal page register that can be used to expand the microcontroller address space by a factor of 256.
Specifications:
|
part no. |
PSD813F1A90J |
|
Manufacturer |
STMicroelectronics |
|
supply ability |
10000 |
|
datecode |
10+ |
|
package |
PQFP52/PLCC52/TQFQ64 |
|
remark |
new and original stock |
Competitive Advantage:
Warranty :180 days !
Free shipping: Order over $1000 win a free shipment fee
(goods weight below 3Kg) ,during 20130901-20130930 .
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