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DS3134 Datasheet(PDF) 161 Page - Dallas Semiconductor |
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DS3134 Datasheet(HTML) 161 Page - Dallas Semiconductor |
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161 / 203 page  DS3134 161 of 203 Register Name: PLBM Register Description: PCI Local Bus Memory Base Address Register Register Address: 0x110h lsb Base Address (Read Only / set to 0h) PF TYPE1 TYPE0 MSI Base Address Base Address (Read Only / set to 0h) Base Address msb Base Address Read only bits in the PLBM register are indicated above by being underlined. All other bits are read- write. Bit 0 / Memory Space Indicator (MSI). This read only bit is forced to zero to indicate that the Local Bus is mapped to memory space. Bits 1 & 2 / Type 0 & Type 1. These read only bits are forced to 00b to indicate that the Local Bus can be mapped anywhere in the 32 bit address space. Bit 3 / Prefetchable (PF). This read only bit is forced to zero to indicate that prefetching is not supported by the device for the Local Bus. Bits 4 to 19 / Base Address. These read only bits are forced to zero to indicate that the Local Bus requires 1M byte of memory space. Bits 20 to 31 / Base Address. These read/write bits define the location of the 1M byte memory space that is mapped to the Local Bus. These bits correspond to the most significant bits of the PCI address space. |
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