* The IOSTANDARD default for single-ended I/O is LVCMOS25, for differential I/Os the default is LVDS_25.
|
I/O Standard |
VIL |
VIH |
VOL |
VOH |
||
|
V, Min |
V, Max |
V, Min |
V, Max |
V, Max |
V, Min |
|
|
LVTTL |
–0.5 |
0.8 |
2.0 |
4.1 |
0.4 |
2.4 |
|
LVCMOS33 |
–0.5 |
0.8 |
2.0 |
4.1 |
0.4 |
VCCO – 0.4 |
|
LVCMOS25 |
–0.5 |
0.7 |
1.7 |
4.1 |
0.4 |
VCCO – 0.4 |
* To use LVCMOS25 inputs when VCCO is not 2.5V, VCCAUX must be set to 2.5V.
* Single-ended I/O outputs that are not available in Banks 0 and 2.
* VCCO required when using I/O standard for an OUTPUT...
|
Single-Ended I/O Standard |
VCCO Supply and I/O Compatibility |
||||
|
1.2V |
1.5V |
1.8V |
2.5V |
3.3V |
|
|
LVTTL |
Input |
Input |
Input |
Input |
Input/ Output |
|
LVCMOS33 |
Input |
Input |
Input |
Input |
Input/ Output |
|
LVCMOS25 |
Input |
Input |
Input |
Input/ Output |
Input |
VIH نمایشگرهای LCD کاراکتری 1602 با ولتاژ کاری 5 ولت، غالبا 2.2V است. بنابراین اتصال مستقیم آنها به FPGA امکان پذیر است...
* The VCCO supplies, one for each of the I/O banks, power the output drivers and some of the input drivers.
* VCCINT is the main power supply for the internal FPGA logic. VCCINT also powers some of the available input drivers.
* VCCAUX is an auxiliary source of power used for various Spartan-6 FPGA functions, including some of the I/O circuitry.
در اکثر بردهای آموزشی، VCCO را به 3،3 ولت و VCCINT را به 2،5 ولت وصل کرده اند ...
* Spartan-6 FPGA LX9 contains four I/O banks...
* The maximum input voltage on the input pad can be VCCO +0.5V... -> Spartan I/O is NOT 5V-tolerant.
