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PM7340 参数 Datasheet PDF下载

PM7340图片预览
型号: PM7340
PDF下载: 下载PDF文件 查看货源
内容描述: S / UNI ATM反向多路复用, 8个环节 [S/UNI INVERSE MULTIPLEXING FOR ATM, 8 LINKS]
分类和应用: ATM集成电路SONET集成电路SDH集成电路电信集成电路电信电路异步传输模式
文件页数/大小: 334 页 / 2670 K
品牌: PMC [ PMC-SIERRA, INC ]
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PM7340 S/UNI-IMA-8  
PRELIMINARY  
INVERSE MULTIPLEXING OVER ATM  
DATA SHEET  
PMC-2001723  
ISSUE 3  
INVERSE MULTIPLEXING OVER ATM  
Register 0x046: SDRAM DIAG Indirect Burst Ram Data LSB  
Bit  
Type  
Function  
Default  
15:0  
R/W  
BR_DATA_LSB  
0
This register should not be written while the BR_BUSY bit is set in the SDRAM  
Burst RAM Indirect Access register.  
BR_DATA_LSB:  
The BR_DATA_LSB represents either: (1) the least significant 16 bits of the  
data to be written to internal memory or (2) the least significant 16 bits of the  
read data resulting from the previous read operation. The read data is not  
valid until after the BR_BUSY bit has been cleared.  
Register 0x048: SDRAM DIAG Indirect Burst RAM Data MSB  
Bit  
Type  
Function  
Default  
15:0  
R/W  
BR_DATA_MSB  
0
This register should not be written while the BR_BUSY bit is set in the SDRAM  
Burst RAM Indirect Access register.  
BR_DATA_MSB:  
The BR_DATA_MSB represents either: (1) the most significant 16 bits of the  
data to be written to internal memory or (2) the most significant 16 bits of the  
read data resulting from the previous read operation. The read data is not  
valid until after the BR_BUSY bit has been cleared.  
The following explains the Burst RAM accessed by the indirect access.  
Burst RAM: The microprocessor has access to the external SDRAM for  
diagnostic testing. There is a 64-byte cell buffer for writing to the external  
SDRAM and a 64-byte cell buffer for storing data read from the external SDRAM.  
Figure 24 shows the format of the cell in the Burst RAM.  
Figure 24  
-Burst RAM Format  
Word # 31 Bits  
0
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE  
121