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XIO2000AI 数据表(PDF) 86 Page - Texas Instruments |
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XIO2000AI 数据表(HTML) 86 Page - Texas Instruments |
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86 / 165 page  Classic PCI Configuration Space 77 April 2007 Revised October 2008 SCPS155C 4.57 Serial-Bus Slave Address Register The serial-bus slave address register indicates the slave address of the device being targeted by the serial-bus cycle. This register also indicates if the cycle is a read or a write cycle. Writing to this register initiates the cycle on the serial interface. See Table 4−31 for a complete description of the register contents. PCI register offset: B2h Register type: Read/Write Default value: 00h BIT NUMBER 7 6 5 4 3 2 1 0 RESET STATE 0 0 0 0 0 0 0 0 Table 4−31. Serial-Bus Slave Address Register Description BIT FIELD NAME ACCESS DESCRIPTION 7:1† SLAVE_ADDR RW Serial-bus slave address. This 7-bit field is the slave address for a serial-bus read or write transaction. The default value for this field is 000 0000b. 0† RW_CMD RW Read/write command. This bit determines if the serial-bus cycle is a read or a write cycle. 0 = A single byte write is requested (default) 1 = A single byte read is requested † These bits are reset by a PCI Express reset (PERST), a GRST, or the internally-generated power-on reset. |
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