M1AFS600-PQ208 Datasheet, PDF (12/334 Pages) Microsemi Corporation – Fusion Family of Mixed Signal FPGAs

Fusion Device Family Overview
(×32) data-port options. Through the programmable flash parallel interface, the on-chip and off-chip
memories can be cascaded for wider or deeper configurations.
The flash memory has built-in security. The user can configure either the entire flash block or the small
blocks to protect against unintentional or intrusive attempts to change or destroy the storage contents.
Each on-chip flash memory block has a dedicated controller, enabling each block to operate
independently.
The flash block logic consists of the following sub-blocks:
• Flash block – Contains all stored data. The flash block contains 64 sectors and each sector
contains 33 pages of data.
• Page Buffer – Contains the contents of the current page being modified. A page contains 8 blocks
of data.
• Block Buffer – Contains the contents of the last block accessed. A block contains 128 data bits.
• ECC Logic – The flash memory stores error correction information with each block to perform
single-bit error correction and double-bit error detection on all data blocks.
User Nonvolatile FlashROM
In addition to the flash blocks, Fusion devices have 1 Kbit of user-accessible, nonvolatile FlashROM on-
chip. The FlashROM is organized as 8×128-bit pages. The FlashROM can be used in diverse system
applications:
• Internet protocol addressing (wireless or fixed)
• System calibration settings
• Device serialization and/or inventory control
• Subscription-based business models (for example, set-top boxes)
• Secure key storage for communications algorithms protected by security
• Asset management/tracking
• Date stamping
• Version management
The FlashROM is written using the standard IEEE 1532 JTAG programming interface. Pages can be
individually programmed (erased and written). On-chip AES decryption can be used selectively over
public networks to load data such as security keys stored in the FlashROM for a user design.
The FlashROM can be programmed (erased and written) via the JTAG programming interface, and its
contents can be read back either through the JTAG programming interface or via direct FPGA core
addressing.
The FlashPoint tool in the Fusion development software solutions, Libero SoC and Designer, has
extensive support for flash memory blocks and FlashROM. One such feature is auto-generation of
sequential programming files for applications requiring a unique serial number in each part. Another
feature allows the inclusion of static data for system version control. Data for the FlashROM can be
generated quickly and easily using the Libero SoC and Designer software tools. Comprehensive
programming file support is also included to allow for easy programming of large numbers of parts with
differing FlashROM contents.
SRAM and FIFO
Fusion devices have embedded SRAM blocks along the north and south sides of the device. Each
variable-aspect-ratio SRAM block is 4,608 bits in size. Available memory configurations are 256×18,
512×9, 1k×4, 2k×2, and 4k×1 bits. The individual blocks have independent read and write ports that can
be configured with different bit widths on each port. For example, data can be written through a 4-bit port
and read as a single bitstream. The SRAM blocks can be initialized from the flash memory blocks or via
the device JTAG port (ROM emulation mode), using the UJTAG macro.
In addition, every SRAM block has an embedded FIFO control unit. The control unit allows the SRAM
block to be configured as a synchronous FIFO without using additional core VersaTiles. The FIFO width
and depth are programmable. The FIFO also features programmable Almost Empty (AEMPTY) and
Almost Full (AFULL) flags in addition to the normal EMPTY and FULL flags. The embedded FIFO control
unit contains the counters necessary for the generation of the read and write address pointers. The
SRAM/FIFO blocks can be cascaded to create larger configurations.
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