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CS5535-UDC Datasheet(PDF) 39 Page - National Semiconductor (TI) |
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CS5535-UDC Datasheet(HTML) 39 Page - National Semiconductor (TI) |
39 / 555 page Revision 0.8 39 www.national.com Signal Definitions (Continued) 2.2.5 System Management Bus (SMB) Interface Signal Name Ball No. Type Description SMB_CLK G3 I/O SMB Clock. This is the clock for the System Management bus. It is initiated by the master of the current transaction. Data is sampled dur- ing the high state of the clock. An external pull-up resistor is required. Shared with GPIO14. Set GPIO14 to AUX_IN and AUX_OUT_1 modes simultaneously to use as SMB_CLK. See Table 2-8 "GPIO Options" on page 42. External voltage applied to this ball should not exceed VIO. SMB_DATA F1 I/O SMB Data. This is the bidirectional data line for the System manage- ment Bus. Data may change during the low state of the SMB clock and should remain stable during the high state. An external pull-up resistor is required. Shared with GPIO15. Set GPIO15 to AUX_IN and AUX_OUT_1 modes simultaneously to use as SMB_DATA. See Table 2-8 "GPIO Options" on page 42. External voltage applied to this ball should not exceed VIO. |
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