参数资料
型号: IP-RLDRAMII
厂商: Altera
文件页数: 28/62页
文件大小: 0K
描述: IP RLDRAM II CONTROLLER
标准包装: 1
系列: *
类型: MegaCore
功能: RLDRAM II 控制器
许可证: 初始许可证
Interfaces
Figure 2–12. Write Example
clk
Local Interface
local_write_req
local_read_req
local_addr[]
local_ba[]
A
A
B
B
C
C
local_wdata_req
local_wdata[]
local_dm[]
RLDRAM II Interface
rldramii_clk
rldramii_clk_n
rldramii_cs_n
rldramii_we_n
rldramii_ref_n
A01 A23A45 A67 B01 B23 B45 B67 C01 C23 C45
00
C67
rldramii_a[]
rldramii_ba[]
rldramii_dm[]
A
A
11
B
B
00
C
C
11
rldramii_d[]
0 1 23 45 6 70 1 2 3 4 5 67 0 1 2 3 4 5 6 7
rldramii_qk[]
rldramii_qvld[]
rldramii_q[]
Figure 2–12 shows the transactions at the local interface are separated by
the correct number of clock cycles for the target RLDRAM II device
configuration. If transaction requests are supplied to the RLDRAM II
controller with the incorrect spacing the controller executes these
transactions as requested, which can result in incorrect behavior.
Figure 2–13 shows an example of a write following a read at a CIO
RLDRAM II interface. In this example, the memory burst length is set to
two beats. The RLDRAM II device is setup with a t RC of six-clock cycles
(configuration two).
f
For more information about bus turnaround timing calculations with
CIO devices, refer to AN 325: Interfacing RLDRAM II with Stratix II,
Stratix & Stratix GX Devices .
2–18 MegaCore Version 9.1
RLDRAM II Controller MegaCore Function User Guide
Altera Corporation
November 2009
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