参数资料
型号: IP-SRAM/QDRII
厂商: Altera
文件页数: 52/68页
文件大小: 0K
描述: IP QDRII SRAM CONTROLLER
标准包装: 1
系列: *
类型: MegaCore
功能: QDRII SRAM 控制器
许可证: 初始许可证
Interfaces & Signals
Figure 3–17. Simultaneous Read & Write—Burst of Four (Narrow Mode)
avl_clk
avl_read
avl_adr_rd[19:0]
1000 1001
1002
1003
avl_wait_request_rd
avl_data_read_valid
avl_data_rd[17:0]
avl_write
avl_adr_wr[19:0]
avl_wait_request_wr
avl_data_wr[17:0]
qdrii_k
qdrii_a[19:0]
qdrii_d[17:0]
qdrii_wpsn
qdrii_rpsn
qdrii_cqn
qdrii_cq
qdrii_q[17:0]
0102 0304 0506 0708
3000 3001 3002 3003
1112 1314 1516 1718
3000 1000 3002 1002
11 12 13 14 15 16 17 18
01 02 03 04 05 06 07 08
Burst of Two
For the burst of two, the protocol already allows simultaneous reads and
writes by asserting readn and writen and their respective addresses for
only half a clock cycle. No arbitration on the Avalon interface is required
and you can use the full bandwidth, without even losing any initial
cycles. Figure 3–18 on page 3–21 shows concurrent reads and writes in a
burst of two configuration.
3–20 MegaCore Version 9.1
Altera Corporation
QDRII SRAM Controller MegaCore Function User Guide
November 2009
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