set_iobank bankname [-vcci vcci_voltage] [-vref vref_voltage] [-inputdelay bits_setting] [-lpinput value] [-lpoutput value]
bankname
Specifies the name of the bank. Axcelerator devices have eight I/O banks, which are numbered 0 through 7. So, their default bank names are bank0, bank1,...bank7.
-vcci vcci_voltage
Sets the input/output supply voltage. You can enter one of the following values:
|
Vcci Voltage |
Compatible Standards |
|
3.3V |
LVTTL, PCI 3.3, PCIX 3.3, SSTL3 (Class I and II), GTL+ 3.3, LVPECL |
|
2.5V |
LVCMOS 2.5, SSTL2 (Class I and II), GTL+2.5, LVDS |
|
1.8V |
LVCMOS 1.8 |
|
1.5V |
LVCMOS 1.5, HSTL (Class I) |
-vref vref_voltage
Sets the input reference voltage. You can enter one of the following values:
|
Vref Voltage |
Compatible Standards |
|
1.5V |
SSTL3 (Class I and II) |
|
1.25V |
SSTL2 (Class I and II) |
|
1.0V |
GTL+ 2.5, GTL+ 3.3 |
|
0.75V |
HSTL (Class I) |
-inputdelay bits_setting
Sets the input delay value (between 0 and 31). A five-bit programmable input delay element is associated with each I/O. Setting the value of this delay is optional for each input buffer within the bank (that is, you can enable or disable the delay element for the I/O). When the input buffer drives a register within the I/O, the delay element is activated by default to ensure a zero hold-time. You can set the default for this property in Designer. The value of this delay is set on a bank-wide basis. You can enter one of the following values (0-31):
|
Bits Setting |
Delay (ns) |
Bits Setting |
Delay (ns) |
|
0 |
0.54 |
16 |
2.01 |
|
1 |
0.65 |
17 |
2.13 |
|
2 |
0.71 |
18 |
2.19 |
|
3 |
0.83 |
19 |
2.3 |
|
4 |
0.9 |
20 |
2.38 |
|
5 |
1.01 |
21 |
2.49 |
|
6 |
1.08 |
22 |
2.55 |
|
7 |
1.19 |
23 |
2.67 |
|
8 |
1.27 |
24 |
2.75 |
|
9 |
1.39 |
25 |
2.87 |
|
10 |
1.45 |
26 |
2.93 |
|
11 |
1.56 |
27 |
3.04 |
|
12 |
1.64 |
28 |
3.12 |
|
13 |
1.75 |
29 |
3.23 |
|
14 |
1.81 |
30 |
3.29 |
|
15 |
1.93 |
31 |
3.41 |
-lpinput value
Enables or disables the low-power mode for input buffers. You can enter one of the following values:
|
Value |
Description |
|
on |
Enables the low-power mode for input buffers. |
|
off |
Disables the low-power mode for input buffers. |
-lpoutput value
Enables or disables the low-power mode for output buffers. You can enter one of the following values:
|
Value |
Description |
|
on |
Enables the low-power mode for output buffers. |
|
off |
Disables the low-power mode for output buffers. |
Note: Refer to the Axcelerator datasheet on the Actel web site for details about the legal values for the vcci and vref arguments.
Any pins assigned to the specified I/O bank that are incompatible with the default technology are unassigned.
Delay values are approximate and will vary with process, temperature, and voltage.
The arguments -inputdelay, -lpinput, and -lpoutput do not apply to RTAXS devices.
set_iobank bank0 -vcci 3.3 -vref 1.5 -inputdelay 1 -lpinput on -lpoutput on