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DS3134 Datasheet(PDF) 157 Page - Dallas Semiconductor |
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DS3134 Datasheet(HTML) 157 Page - Dallas Semiconductor |
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157 / 203 page  DS3134 157 of 203 Register Name: PVID1 Register Description: PCI Vendor ID / Device ID Register 1 Register Address: 0x100 lsb Vendor ID (Read Only / set to EAh) Vendor ID (Read Only / set to 13h) Device ID (Read Only / set to 34h) msb DeviceID (Read Only / set to 31h) Bits 0 to 15 / Vendor ID. These read only bits identify Dallas Semiconductor as the manufacturer of the device. The Vendor ID was assigned by the PCI Special Interest Group and is fixed at 13EAh. Bits 16 to 31 / Device ID. These read only bits identify the DS3134 as the device being used. The Device ID was assigned by Dallas Semiconductor and is fixed at 3134h. Register Name: PCMD1 Register Description: PCI Command / Status Register 1 Register Address: 0x104 lsb STEPC PARC VGA MWEN SCC MASC MSC IOC Reserved (Read Only / set to all zeros) FBBEN PSEC FBBCT UDF 66 MHz Reserved (Read Only / set to all zeros) msb PPE PSE MABT TABTM TABT DTS1 DTS0 PARR Read only bits in the PCMD1 register are indicated above by being underlined. All other bits are read- write. The lower word (bits 0 to 15) of the PCMD1 register is the Command portion and is used for control of the PCI bus. When all bits in the lower word are set to zero, then the device is logically disconnected from the bus for all accesses except for accesses to the configuration registers. The upper word (bits 16 to 31) is the Status portion and it is used for status information. Reads to the Status portion behave normally but writes are unique in that bits can be reset (i.e. forced to zero) but not set (i.e. forced to one). A bit in the Status portion will be reset when a one is written to that bit position. Bit positions that have a zero written to them will not be reset. |
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