ProASIC3E Flash Family FPGAs
Advanced Architecture
The proprietary ProASIC3E architecture provides granularity comparable to standard-cell ASICs. The
ProASIC3E device consists of five distinct and programmable architectural features (Figure 1-1 on
page 3):
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FPGA VersaTiles
Dedicated FlashROM
Dedicated SRAM/FIFO memory
Extensive CCCs and PLLs
Pro I/O structure
The FPGA core consists of a sea of VersaTiles. Each VersaTile can be configured as a three-input
logic function, a D-flip-flop (with or without enable), or a latch by programming the appropriate
flash switch interconnections. The versatility of the ProASIC3E core tile as either a three-input
lookup table (LUT) equivalent or as a D-flip-flop/latch with enable allows for efficient use of the
FPGA fabric. The VersaTile capability is unique to the Actel ProASIC family of third-generation
architecture Flash FPGAs. VersaTiles are connected with any of the four levels of routing hierarchy.
Flash switches are distributed throughout the device to provide nonvolatile, reconfigurable
interconnect programming. Maximum core utilization is possible for virtually any design.
In addition, extensive on-chip programming circuitry allows for rapid, single-voltage (3.3 V)
programming of ProASIC3E devices via an IEEE 1532 JTAG interface.
CCC
RAM Block
4,608-Bit Dual-Port SRAM
or FIFO Block
Pro I/Os
VersaTile
RAM Block
4,608-Bit Dual-Port SRAM
or FIFO Block
User Nonvolatile
Charge Pumps
ISP AES Decryption
FlashROM
Figure 1-1 • ProASIC3E Device Architecture Overview
v1.0
1-3
ACTEL [ Actel Corporation ]
