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EX128-FCS100 Datasheet(PDF) 9 Page - Actel Corporation |
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EX128-FCS100 Datasheet(HTML) 9 Page - Actel Corporation |
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9 / 44 page  eX Automotive Family FPGAs v3.2 1-5 Other Architectural Features Performance The combination of the various architectural features enables automotive-grade eX devices to operate with internal clock frequencies at 250 MHz for fast execution of complex logic functions. Automotive-grade eX devices are the optimal platforms upon which to integrate in-cabin telematics and automobile interconnect applications previously only contained in ASICs or gate arrays. eX devices meet the performance goals of gate arrays, and, at the same time, present significant improvements in cost and time to market. Using timing-driven place- and-route tools, designers can achieve highly deterministic device performance. User Security The Actel FuseLock advantage ensures that unauthorized users will not be able to read back the contents of an Actel antifuse FPGA. In addition to the inherent strengths of the architecture, there is a special Security Fuse inside the eX device that disables the probing circuitry and prohibits further programming of the device. This Fuse cannot be accessed or bypassed without destroying access to the rest of the device, making both invasive and more-subtle noninvasive attacks ineffective against Actel antifuse FPGAs. Look for this symbol to ensure your valuable IP is secure. For more information, refer to Actel's Implementation of Security in Actel Antifuse FPGAs application note. I/O Modules Each I/O on an eX device can be configured as an input, an output, a tristate output, or a bidirectional pin. I/O cells in eX devices do not contain embedded latches or flip-flops and can be inferred directly from HDL code. The device can easily interface with any other device in the system, which in turn enables parallel design of system components and reduces overall design time. All unused I/Os are configured as tristate outputs by Actel's Designer software, for maximum flexibility when designing new boards or migrating existing designs. However, it is still recommended to tie all unused I/O pins to GND on the board. Each I/O module has an available pull-up or pull-down resistor of approximately 50 k Ω that can configure the I/O in a known state during power-up. Just shortly before VCCA reaches 2.5 V, the resistors are disabled and the I/Os will be controlled by user logic. Table 1-2 describes the I/O features of eX devices. For more information on I/Os, refer to the Actel eX, SX-A, and RT54SX-S I/Os application note. The automotive eX devices support I/O operation at 2.5 V and 3.3 V. The detailed description of the I/O pins in eX automotive devices can be found in "Pin Description" section on page 1-24. Hot Swapping eX I/Os are configured to be hot-swappable. During power-up/down (or partial up/down), all I/Os are tristated, provided VCCA ramps up within a diode drop of VCCI. VCCA and VCCI do not have to be stable during power-up/down, and they do not require a specific power-up or power- down sequence in order to avoid damage to the eX devices. In addition, all outputs can be programmed to have a weak resistor pull-up or pull-down for tristate output at power-up. After the eX device is plugged into an electrically active system, the device will not degrade the reliability of or cause damage to the host system. The device's output pins are driven to a high impedance state until normal chip operating conditions are reached. Please see the application note, Actel SX-A and RT54SX-S Devices in Hot-Swap and Cold-Sparing Applications, which also applies to eX devices, for more information on hot swapping. Figure 1-7 • FuseLock FuseLock Table 1-2 • I/O Features Function Description Input Buffer Threshold Selection • 3.3 V LVTTL • 2.5 V LVCMOS2 Nominal Output Drive • 3.3 V LVTTL • 2.5 V LVCMO 2 Output Buffer “Hot-Swap” Capability • I/O on an unpowered device does not sink current • Can be used for “cold sparing” • Selectable on an individual I/O basis Individually selectable low-slew option Power-Up Individually selectable pull-ups and pull-downs during power-up (default is to power-up in tristate) Enables deterministic power-up of device VCCA and VCCI can be powered in any order |
Similar Part No. - EX128-FCS100 |
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Similar Description - EX128-FCS100 |
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