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XIO2221 Datasheet(PDF) 77 Page - Texas Instruments |
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XIO2221 Datasheet(HTML) 77 Page - Texas Instruments |
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77 / 196 page  XIO2221 www.ti.com SCPS216A – JULY 2009 – REVISED FEBRAURY 2010 BIT NUMBER 7 6 5 4 3 2 1 0 RESET STATE 0 0 0 0 0 0 0 0 4.58 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 4-32 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 4-32. Serial-Bus Slave Address Register Descriptions BIT FIELD NAME ACCESS DESCRIPTION 7:1(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(1) 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. (1) These bits shall only be reset by a fundamental reset (FRST). FRST is asserted (low) whenever PERST or GRST is asserted. Copyright © 2009–2010, Texas Instruments Incorporated Classic PCI Configuration Space 77 Submit Documentation Feedback Product Folder Link(s): XIO2221 |
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