HC4GX15 Datasheet, PDF (52/668 Pages) Altera Corporation – HardCopy IV Device Handbook

6–2
Chapter 6: HardCopy IV Device I/O Features
Differences Between HardCopy IV ASICs and Stratix IV FPGAs
■ Single data rate (SDR) and half data rate (HDR, half frequency and twice the data
width of SDR) input and output options
■ Up to 88 full duplex 1.25 Gbps true LVDS channels (88Tx + 88Rx) on the row I/O
banks
Features supported in a single-ended I/O interface:
■ De-skew, read and write leveling, and clock-domain crossing functionality
■ Multiple output current strength setting for different I/O standards
■ Four slew rate settings
■ Four output delay settings
■ Six I/O delay settings
■ Optional bus-hold
■ Optional pull-up resistor
■ Optional open-drain output
■ Serial, parallel, and dynamic on-chip termination (OCT)
Features supported in a high-speed memory interface:
■ Dedicated DQS logic in both column and row I/Os
■ Each I/O bank is accessible by two delay-locked loops (DLLs) that have different
frequencies and phase shift
■ Low power option when the memory interface is not used
Features supported in a high-speed differential I/O interface:
■ Four slew rate settings
■ Differential OCT
■ Hard dynamic phase alignment (DPA) block with serializer/deserializer
(SERDES)
■ Four pre-emphasis settings
■ Four differential output voltage (V_OD) settings
Differences Between HardCopy IV ASICs and Stratix IV FPGAs
Both HardCopy IV and Stratix IV devices support the same speed, performance, I/O
standards, and implementation guidelines. You must set the HardCopy IV
companion device for your Stratix IV design project in the Quartus^® II software.
Otherwise, you may not be able to map to a HardCopy IV device, because of the
varying amounts of resource availability. There are three major differences between
HardCopy IV ASICs and Stratix IV FPGAs:
■ There are eight calibration blocks in HardCopy IV devices instead of up to 10
calibration blocks in Stratix IV devices.
■ Stratix IV devices support up to 24 I/O banks, while HardCopy IV devices
support up to 20 I/O banks.
HardCopy IV Device Handbook, Volume 1
© January 2010 Altera Corporation