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数据搜索系统，热门电子元器件搜索 |
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SC2200 数据表(PDF) 79 Page - National Semiconductor (TI) |
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SC2200 数据表(HTML) 79 Page - National Semiconductor (TI) |
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79 / 433 page  Revision 3.0 79 www.national.com Signal Definitions (Continued) 2.4.20 Power, Ground and No Connections1 1. All power sources must be connected, even if the function is not used Signal Name Ball No. Type Description EBGA TEPBGA AVSSPLL2 R3 C16 GND PLL2 Analog Ground Connection. AVSSPLL3 E28 AK3 GND PLL3 Analog Ground Connection. VPLL2 R1 A17 PWR 3.3V PLL2 Analog Power Connection. Low noise power for PLL2 and PLL5. VPLL3 C31 AJ4 PWR 3.3V PLL3 Analog Power Connection. Low noise power for PLL3, PLL4, and PLL6. AVCCUSB AF4 D27 PWR 3.3V Analog USB Power Connection. Low noise power. AVSSUSB AG1 C27 GND Analog USB Ground Connection. AVCCCRT L3, M1, N1 A12, C13, D15 PWR 3.3V Analog CRT DAC Power Connections. Low noise power. AVSSCRT L1, N3, P3 B14, C14, C15 GND Analog CRT DAC Ground Connections.Return current. VCCCRT K3 D12 PWR 1.8V / 2.0V CRT DAC Digital Power Connection. Can be directly connected to VCORE on PCB (printed circuit board). VSSCRT K2 C12 GND CRT DAC Digital Ground Connection. Can be directly connected to VSS on PCB. VBAT D30 AL3 PWR Battery. Provides battery back-up to the RTC and ACPI registers, when VSB is lower than the minimum value (see Table 8-2 on page 358). The ball is con- nected to the internal logic through a series resistor for UL protection. VSB F29 AL5 PWR 3.3V Standby Power Supply. Provides power to the Real-Time Clock (RTC) and ACPI circuitry while the main power supply is turned off. VSBL H28 AL6 PWR 1.8V / 2.0V Standby Power Supply. Provides power to the internal logic while the main power supply is turned off. This signal requires a 0.1 µF bypass capacitor to VSS. This supply must be present when VSB is present. VCORE See Table 2-3 on page 32. (Total of 25) See Table 2-5 on page 47. (Total of 28) PWR 1.8V / 2.0V Core Processor Power Connections. VIO See Table 2-3 on page 32. (Total of 32) See Table 2-5 on page 47. (Total of 43) PWR 3.3V I/O Power Connections. VSS See Table 2-3 on page 32. (Total of 57) See Table 2-5 on page 47. (Total of 92) GND Ground Connections. NC See Table 2-3 on page 32. (Total of 8) See Table 2-5 on page 47. (Total of 8) --- No Connections. These lines should be left discon- nected. Connecting a pull-up/-down resistor or to an active signal could cause unexpected results and pos- sible malfunctions. |
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