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319537-003US 参数 Datasheet PDF下载

319537-003US图片预览
型号: 319537-003US
PDF下载: 下载PDF文件 查看货源
内容描述: 英特尔系统控制器中心 [Intel System Controller Hub]
分类和应用: 控制器
文件页数/大小: 450 页 / 2593 K
品牌: INTEL [ INTEL ]
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Intel® HD Audio (D27:F0)  
10.3.16 CORBWP—CORB Write Pointer Register  
Memory Address:  
Default Value:  
LBAR + 48h  
0000h  
Attribute:  
Size:  
R/W, RO  
16 bits  
Default  
Bit  
and  
Description  
Access  
00h  
RO  
15:8  
Reserved  
CORB Write Pointer: Software writes the last valid CORB entry offset into  
this field in Dword granularity. The DMA engine fetches commands from  
the CORB until the Read pointer matches the Write pointer. Supports  
256 CORB entries (256 x 4 byte = 1 KB). This register field may be written  
when the DMA engine is running.  
00h  
R/W  
7:0  
10.3.17 CORBRP—CORB Read Pointer Register  
Memory Address:  
Default Value:  
LBAR + 4Ah  
0000h  
Attribute:  
Size:  
R/W, RO  
16 bits  
Default  
Bit  
and  
Description  
Access  
CORB Read Pointer Reset: Software writes a 1 to this bit to reset the  
CORB Read Pointer to 0 and clear any residual prefetched commands in the  
CORB hardware buffer within the Intel HD Audio controller. The hardware  
will physically update this bit to 1 when the CORB Pointer reset is complete.  
Software must read a 1 to verify that the reset completed correctly.  
Software must clear this bit back to 0 and read back the 0 to verify that the  
clear completed correctly. The CORB DMA engine must be stopped prior to  
resetting the Read Pointer or else DMA transfer may be corrupted.  
0
R/W  
15  
00h  
RO  
14:8  
7:0  
Reserved  
CORB Read Pointer (CORBRP): Software reads this field to determine  
how many commands it can write to the CORB without over-running. The  
value read indicates the CORB Read Pointer offset in Dword granularity. The  
offset entry read from this field has been successfully fetched by the DMA  
controller and may be over-written by software. Supports 256 CORB entries  
(256 x 4 byte =1 KB). This field may be read while the DMA engine is  
running.  
00h  
RO  
154  
Datasheet