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CS5535-UDC Datasheet(PDF) 19 Page - National Semiconductor (TI) |
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CS5535-UDC Datasheet(HTML) 19 Page - National Semiconductor (TI) |
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19 / 555 page  Revision 0.8 19 www.national.com Signal Definitions (Continued) 2.1 BALL ASSIGNMENTS As illustrated in Figure 2-1 on page 18, the CS5535 is con- figurable. Boot options and register programming are used to set various modes of operation and specific signals on specific balls. This section describes the ball assignments and interface options: • Figure 2-2 "208-PBGA Ball Assignment Diagram" on page 20: — Top view looking through package. • Table 2-2 "Ball Assignments: Sorted by Ball Number" on page 21: — Primary signal name is listed first. — Includes a column labeled Buffer Type. See Section 2.1.1 "Buffer Types" on page 28 for details. — Includes a column labeled Configuration with refer- ences to: – BOS[1:0] - See Section 2.1.2 "Boot Options" on page 29. – Ball Opt MSR - See Section 2.1.3 "Ball Options" on page 29. – AUX_IN, AUX_OUT_1, and AUX_OUT_2 - See Section 2.2.8 "GPIOs" on page 42. • Table 2-3 "Ball Assignments: Sorted Alphabetically by Signal Name" on page 25: — Quick-reference list, sorted alphabetically with primary signal listed first. The tables in this section use several abbreviations. Table 2-1 lists the mnemonics and their meanings. Table 2-1. Abbreviations/Definitions Mnemonic Definition A Analog AVSS Analog Ground Connection AVDD Analog Power Connection GND Ground I Input I/O Bidirectional O Output OD Open-drain Ball Opt MSR Model Specific Register Ball Options: A register is used to configure balls with multiple functions. Refer to Section 2.1.3 "Ball Options" on page 29 for further details. PD Pull-down resistor PWR Power PU Pull-up resistor TS TRI-STATE VCORE 1.5V Core Power Working Connection VCORE_VSB 1.5V Core Power Standby Connection VIO 3.3V I/O Power Working Connection VIO_VSB 3.3V I/O Power Standby Connection VSS Ground # The “#” symbol at the end of a signal name indicates that the active, or asserted state occurs when the signal is at a low voltage level. When “#” is not present after the signal name, the signal is asserted when at a high voltage level. / A “/” in a signal name indicates the function is always enabled (i.e., time multiplexed - available when needed). + A “+” in a signal name indicates the function is available on the ball, but that either strapping options or register programming is required to select the desired function. |
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