Digital Signal Processing Reference
In-Depth Information
Status
Generator
Exchange
Controller
Priority
Decoder
Interconnect
Bus
Interface
Controller
Interface
Controller
to/from Buffers
to/from Buffers
Fig. 14
PE-CU-PE controls
In order to avoid such deadlock, a priority decoder is needed to modify the state,
so that internal particle balancing network can be established. A priority decoder is
used to set and reset the connections between sources and destinations based on all
may have multiple possibilities.
The connection termination condition is when the source does not have any
particles in the RTB
id
or the destination received enough particles. Once any one
of these conditions is satisfied, the connection is reset and a new connection is
established. In order not to get back to the original condition, the controller must
ensure that at least one particle is transferred before terminating the connection.
Otherwise it will get back to the original condition and cause an infinite loop without
any particle transfer. If there are no particles in RTB
id
and
N
RB
i
+
N
TB
i
−
1
+
N
RT B
iu
=
N
PT R
i
=
0, the corresponding PE CU
i
interface will not participate in the particle
exchange.
3.8
Concurrent Execution Control
There are four major controller components for proper execution of the CU as shown
various components of the controller. The signals are mainly generated using the
generator is physically distributed. These signals are used by the exchange con-
troller, priority decoder, and independent PE CU interface controller. The exchange
controller decides the pairing of buffers for the particle transfers. The priority
decoder generates correct pairing of each PE CU interface based on the current
state of the internal particle balancing.
