U1AFS600-1PQG208
| Model | U1AFS600-1PQG208 |
| Description | Field Programmable Gate Array, |
| PDF file | Total 334 pages (File size: 18M) |
| Chip Manufacturer | MICROSEMI |
Device Architecture
At the system level, the skew circuit can be used in applications where transmission activities on
bidirectional data lines need to be coordinated. This circuit, when selected, provides a timing margin that
can prevent bus contention and subsequent data loss or transmitter overstress due to transmitter-to-
transmitter current shorts.
presents an example of the skew circuit implementation in a
bidirectional communication system.
shows how bus contention is created, and
shows how it can be avoided with the skew circuit.
Transmitter 1: Fusion I/O
Skew or
Bypass
Skew
Routing
Delay (t1)
EN(b1)
Transmitter
ENABLE/
DISABLE
Transmitter 2: Generic I/O
EN(b2)
Routing
Delay (t2)
EN(r1)
ENABLE(t2)
ENABLE(t1)
Bidirectional Data Bus
Figure 2-108 •
Example of Implementation of Skew Circuits in Bidirectional Transmission Systems Using
Fusion Devices
EN (b1)
EN (b2)
ENABLE (r1)
ENABLE (t1)
Transmitter 1: OFF
ENABLE (t2)
Transmitter 2: ON
Transmitter 1: ON
Transmitter 1: OFF
Transmitter 2: OFF
Bus
Contention
Figure 2-109 •
Timing Diagram (bypasses skew circuit)
2- 15 2
R e visio n 2
