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SC1100 Datasheet(PDF) 48 Page - National Semiconductor (TI) |
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SC1100 Datasheet(HTML) 48 Page - National Semiconductor (TI) |
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48 / 348 page  www.national.com 48 Revision 1.1 Signal Definitions (Continued) GTEST AD21 I Global Test. This signal is used for internal testing only. For normal operation, tie this signal low. --- 2.4.16 Power1, Ground and No Connections 1. All power sources must be connected, even if the corresponding function is not used Signal Name Ball No. Type Description AVSSPLL AF9 GND Analog PLL Ground Connection AVCCUSB AF6 PWR 3.3V Analog USB Power Connection (Low noise power) AVSSUSB AD9 GND Analog USB Ground Connection VBAT W3 PWR Battery. Provides battery back-up to the RTC and ACPI registers, when VSB is lower than the minimum value (see Table 7-2 on page 281). The ball is connected to the internal logic through a series resis- tor for UL protection. VCORE Refer to Table 2-3 on page 27 (Total of 24) PWR 1.8V or 2.0V Core Processor Power Connections VIO Refer to Table 2-3 on page 27 (Total of 28) PWR 3.3V I/O Power Connections VPLL AE9 PWR 3.3V PLL2 Analog Power Connection (Low noise power) VSB AF16 PWR 3.3V Standby Power Supply. Provides power to the RTC and ACPI circuitry while the main power supply is turned off. VSBL AD16 PWR 1.8V, 1.9V or 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 V SS. This supply must be present when VSB is present. VSS Refer to Table 2-3 on page 27 (Total of 60) GND Ground Connections NC A21, A23, D20, AC23, AE24, AF24 --- No Connections. For normal operation, leave these signals uncon- nected. 2.4.15 Test and Measurement Interface Signals (Continued) Signal Name Ball No. Type Description Mux |
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