Altera RapidIO II MegaCore Function Manuel d'utilisateur Page 134

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5–10 Chapter 5: Signals
Logical and Transport Layer Signals
RapidIO II MegaCore Function August 2014 Altera Corporation
User Guide
Avalon-ST Pass-Through Interface Signals
This section tells you where you can find the Avalon-ST pass-through interface
signals.
Table 511 lists the location of the signal lists and descriptions for the Avalon-ST
pass-through interface.
Data Streaming Support Signals
The RapidIO II IP core provides support for your custom implementation of data
streaming using the Avalon-ST pass-through interface. In addition to Error
Management Extension block signals for user-defined data streaming, the IP core
provides dedicated signals to read and write the
Data Streaming Logical Layer
Control
CSR described in Table 6–32 on page 6–32.
Table 512 lists the signals provided to read and write the
Data Streaming Logical
Layer Control
CSR.
Table 5–11. Avalon-ST Pass-Through Interface Signals
Interface Location of Signal Table
Avalon-ST sink (transmit side of the IP core) Refer to Table 4–24 on page 4–49.
Avalon-ST source (receive side of the IP core):
data signals
Refer to Table 4–27 on page 4–53.
Avalon-ST source (receive side of the IP core):
header signals
Refer to Table 4–28 on page 4–53.
Table 5–12. Data Streaming Support Signals
Signal Direction Description
tm_types[3:0]
Output
These output signals reflect the values of the fields with the corresponding names in
the
Data Streaming Logical Layer Control
CSR at offset 0x48 (Table 6–32 on
page 6–32).
tm_mode[3:0]
Output
mtu[7:0]
Output
tm_mode_wr
Input
Support user logic in setting the
TM_MODE
field in the
Data Streaming Logical
Layer Control
CSR at offset 0x48,
(1)
tm_mode_in[3:0]
Input
mtu_wr
Input
Support user logic in setting the
MTU
field in the
Data Streaming Logical Layer
Control
CSR at offset 0x48,
(1)
mtu_in[7:0]
Input
Note to Table 5–12:
(1) To write to the register field for any of these signal pairs, drive the value on the
_in
signal and then set the
_wr
signal to the value of 1’b1. When
the
_wr
signal has the value of 1’b1, on the rising edge of
sys_clk
, the value of the
_in
signal is written directly to the register field.
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