HC210 datasheet(35/228 Pages) ALTERA

35 / 228 page

Altera Corporation

2–27

September 2008

Preliminary

Power-Up Modes

Power-Up

Modes

The functionality of structured ASICs is determined before they are

produced. Therefore, they do not require programmability. HardCopy II

structured ASICs follow the same principle, enabling traditional

ASIC-like power up. Although prototyping FPGAs require configuration

upon power up, the HardCopy II structured ASICs do not need to be

configured. HardCopy II devices do not support configuration and

designers should take this into account in the prototyping-to-production

development process. The HardCopy II device does not require a

configuration device, but you must ensure that the

nCE pin is low and

that the

nCONFIG and nSTATUS pins are high after power up.

HardCopy II devices do not support FPGA configuration

emulation and other configuration modes, including remote

system upgrades and design security using configuration

bitstream encryption.

HardCopy II devices support both instant on and instant on after 50 ms

power-up modes. In the instant on power-up mode, the HardCopy II

device is available for use shortly after the device powers up to a safe

operating voltage. The on-chip power-on reset (POR) circuit will reset all

registers. The

nCE, nCONFIG, and nSTATUS signals must be at the

appropriate logic levels for the

CONF_DONE output to be tristated once the

POR has elapsed. This option is similar to an ASIC’s functionality upon

power up and is the most likely scenario in production.

In the instant on after 50 ms power-up mode, the HardCopy II device

behaves similarly to the instant on mode, except that there is an

additional delay of 50 ms, during which time the device will be held in

reset. The

CONF_DONE output is pulled low during this time, and then

tri-stated after the 50 ms have elapsed.

For more information about which power-up modes HardCopy II

devices support, refer to the Power-Up Modes and Configuration Emulation

in HardCopy Series Devices chapter in the HardCopy Series Handbook.

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