2.8.4. HVIO Bank
Cyclone® V device supports a wider VCCIO range, while Agilex™ 3 HVIO bank targets a higher VCCIO supply range. For lower voltage range, refer to the "HSIO Banks" section in the General-Purpose I/O User Guide: Agilex™ 3 FPGAs and SoCs.
Each HVIO block contains two HVIO banks. Each HVIO bank is further divided into 20 I/O pins per bank, and each HVIO block has its individual fabric-feeding I/O PLL.
The following table lists the I/O standard and features comparison between Cyclone® V and Agilex™ 3 devices:
I/O Types | Cyclone® V I/O Standards | Agilex™ 3 HVIO I/O Standards |
---|---|---|
Single-ended non-voltage referenced |
|
|
Single-ended and pseudo-differential voltage-referenced |
|
–
Note: Single-ended and pseudo-differential voltage-referenced are supported with HSIO. Refer to HSIO Bank for more information.
|
True differential |
|
–
Note: True Differential is supported with HSIO. Refer to HSIO Bank for more information.
|
Feature | Cyclone® V | Agilex™ 3 HVIO |
---|---|---|
Programmable slew rate | Yes | No |
Programmable output buffer delay | Yes | Yes |
Programmable bus hold | Yes | No |
Programmable weak pull-up resistor | Yes, 25K ohms | Yes, 20K ohms |
Programmable weak pull-down resistor | No | Yes, 20K ohms |
On-chip clamp diode | Yes | No |
Programmable current strength | Yes, 2, 4, 6, 8, 10, 12 mA | Yes, 3, 6, 9, 12 mA |
OCT termination | Yes | No |
Dynamic OCT | Yes | No |
Output enable | Yes | Yes |
Apart from the available features, there are dual-purpose pins to accommodate the usage of the transceiver and Reduced Gigabit Media Independent Interface (RGMII) for each I/O pin in the HVIO bank.
Due to the architectural differences between Cyclone® V and Agilex™ 3 devices, the I/O design guidelines differ for these devices. You must replan your FPGA pin and resource sharing when switching from Cyclone® V FPGA I/O to Agilex™ 3 HVIO bank. Refer to the Agilex™ 3 FPGAs and SoCs Device Data Sheet, General-Purpose I/O User Guide: Agilex™ 3 FPGAs and SoCs, and GTS Transceiver PHY User Guide for more information.