Altera Floating-Point - Manual (Page 44)

Related Information
Fitter Resources Reports
Provides information about Quartus II resource utilization
ALTERA_FP_ACC_CUSTOM Signals
Figure 4-1: ALTERA_FP_ACC_CUSTOM
clk
n
ALTERA_FP_ACC_CUSTOM
r
x
areset
en
xo
xu
ao
Table 4-2: ALTERA_FP_ACC_CUSTOM Input Ports
Port Name Required Description
clk
Yes All input signals, otherwise explicitly stated, must be synchronous to
this clock
areset
Yes Asynchronous active-high reset. Deassert this signal synchronously to
the input clock to avoid metastability issues.
en
No Global enable signal. This port is optional.
x
Yes Data input port.
n
Yes Boolean port which signals the beginning of a new data set to be
accumulated. This should go high together with the first element in the
new data set and should go low the next cycle. The data sets may be of
variable length and a new data set may be started at any time. The
accumulation result for an input will be available after the reported
latency.
Table 4-3: ALTERA_FP_ACC_CUSTOM Output Ports
Port Name Required Description
r
Yes The running value of the accumulation.
UG-01058
2014.12.19
ALTERA_FP_ACC_CUSTOM Signals 4-3
ALTERA_FP_ACC_CUSTOM IP Core Altera Corporation
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