參數(shù)資料
型號: GT-64111
廠商: Galileo Technology Services, LLC
英文描述: System Controller for RC4640, RM523X and VR4300 CPUs(用于RC4640, RM523X和 VR4300 CPUs的系統(tǒng)控制器)
中文描述: 系統(tǒng)控制器(用于RC4640,RM523X和VR4300處理器的系統(tǒng)控制器的RC4640,RM523X和VR4300處理器)
文件頁數(shù): 68/130頁
文件大小: 881K
代理商: GT-64111
GT-64111 System Controller for RC4640, RM523X and VR4300 CPUs
42
Revision 1.0
Figure 20: Ready* Extending AccToNext on Read Cycle, Latches Disabled
ADDRESS
TClk
ALE
ADS*1
AD[31:0]
AcctoFirst = 6
AcctoNext programmed to 3
DATA 1 DRIVEN FROM DEVICE
CS*2
CSTiming*
DevRW*
Notes:
1. Assumes DAdr11/ADS* is programmed to be ADS* only
2. CS* is driven off the same rising TClk* as ALE (and ADS*). Throughout consecutive transactions to the same device, CS* will
remain asserted. This is why CS* must ALWAYS be qualified with CSTiming*.
3. Ready* is sampled as asserted one clock before data should be sampled according to AcctoFirst.
DATA 1 is sampled on
AD[31:0].
4. Ready* is sampled as deasserted one clock before data should be sampled according to AcctoNext. DATA 2 is NOT
sampled.
5. Ready* is asserted on some following rising TClk.
6. AD[31:0] (DATA 2) is sampled on the following rising TClk of the rising TClk that Ready* was asserted. Effectively,
AccToNext is 5 (instead of the programmed 3).
DATA 2 DRIVEN FROM DEVICE
5
Ready*
3
4
6
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