16.1.4 Clocking
(Ask a Question)16.1.4.1 CLKBIBUF
(Ask a Question)Bidirectional Buffer with Input to the global network.
Input | Output |
---|---|
D, E, PAD | PAD, Y |
D | E | PAD | Y |
---|---|---|---|
X | 0 | Z | X |
X | 0 | 0 | 0 |
X | 0 | 1 | 1 |
0 | 1 | 0 | 0 |
1 | 1 | 1 | 1 |
16.1.4.2 CLKBUF
(Ask a Question)Input Buffer to the global network.
Figure 16-53. CLKBUF
Input | Output |
---|---|
PAD | Y |
PAD | Y |
---|---|
0 | 0 |
1 | 1 |
16.1.4.3 CLKBUF_DIFF
(Ask a Question)Differential I/O macro to the global network, Differential I/O.Figure 16-54. CLKBUF_DIFF
Input | Output |
---|---|
PADP, PADN | Y |
PADP | PADN | Y |
---|---|---|
Z | Z | Y |
0 | 0 | X |
1 | 1 | X |
0 | 1 | 0 |
1 | 0 | 1 |
16.1.4.4 CLKINT
(Ask a Question)This macro routes an internal fabric signal to the global network.Figure 16-55. CLKINT
Input | Output |
---|---|
A | Y |
A | Y |
---|---|
0 | 0 |
1 | 1 |
16.1.4.5 CLKINT_PRESERVE
(Ask a Question)This Macro routes an internal fabric signal to the global network. It has
the same functionality as CLKINT except that this clock always stays on the global clock
network and will not be demoted during design implementation.Figure 16-56. CLKINT_PRESERVE
Input | Output |
---|---|
A | Y |
A | Y |
---|---|
0 | 0 |
1 | 1 |
16.1.4.6 GCLKBUF
(Ask a Question)Gated input I/O macro to the global network. The Enable signal can turn off the global network to save power.Figure 16-57. GCLKBUF
Input | Output |
---|---|
PAD, EN | Y |
PAD | EN | q | Y |
---|---|---|---|
0 | 0 | 0 | 0 |
0 | 1 | 1 | 0 |
1 | X | q | q |
Z | X | X | X |
16.1.4.7 GCLKBUF_DIFF
(Ask a Question)Gated differential I/O macro to global network; the Enable signal can be
used to turn off the global network.
Figure 16-58. GCLKBUF_DIFF
Differential
Input | Output |
---|---|
PADP, PADN, EN | Y |
PADP | PADN | EN | q | Y |
---|---|---|---|---|
0 | 1 | 0 | 0 | 0 |
0 | 1 | 1 | 1 | 0 |
1 | 0 | X | q | q |
0 | 0 | X | X | X |
1 | 1 | X | X | X |
Z | Z | X | X | X |
16.1.4.8 GCLKINT
(Ask a Question)Gated macro used to route an internal fabric signal to the global network.
The Enable signal can be used to turn off the global network to save power.
Figure 16-59. GCLKINT
Input | Output |
---|---|
A, EN | Y |
A | EN | q (Internal Signal) | Y |
---|---|---|---|
0 | 0 | 0 | 0 |
0 | 1 | 1 | 0 |
1 | X | q | q |
16.1.4.9 RCLKINT
(Ask a Question)Macro used to route an internal fabric signal to a row global buffer, thus
creating a local clock.Figure 16-60. RCLKINT
Input | Output |
---|---|
A | Y |
A | Y |
---|---|
0 | 0 |
1 | 1 |
16.1.4.10 RGCLKINT
(Ask a Question)Gated macro used to route an internal fabric signal to a row global
buffer, thus creating a local clock. The Enable signal can be used to turn off the local
clock to save power.
Figure 16-61. RGCLKINT
Input | Output |
---|---|
A, EN | Y |
A | EN | q (Internal Signal) | Y |
---|---|---|---|
0 | 0 | 0 | 0 |
0 | 1 | 1 | 0 |
1 | X | q | q |