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CS5535-UDC Datasheet(PDF) 96 Page - National Semiconductor (TI) |
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CS5535-UDC Datasheet(HTML) 96 Page - National Semiconductor (TI) |
96 / 555 page www.national.com 96 Revision 0.8 4.6 DIVERSE INTEGRATION LOGIC The Diverse Integration Logic (DIVIL) connects a series of Local bus devices to the GeodeLink architecture. Figure 4- 10 illustrates how the DIVIL (within the dashed lines) inter- faces with the other devices of the Diverse Device. The main blocks of the DIVIL are: Address Decode, Standard MSRs, Local BARs, and Dataout Mux (DOM). • Address Decode - Decodes the upper Local bus address bits to select a target slave. Most of the legacy devices have fixed addresses or are selectable between a small number of selectable I/O addresses. However, many of the functions are relocatable via a Local Base Address Register (LBAR); established via an MSR. Address Decode also detects special GLIU cycles, such as Shutdown, and takes appropriate action. Figure 4-10. Diverse Logic Block Diagram GLIU Interface RI DI DO RO 8254 & Port B (2) 8259A & Kybd Emu & System Mgmt (2) UART & IR IRQ Map Port A Bus Control (2) 8237 & LPC Bus RTC & CMOS DMA Map Control RAM GPIO & ICF MFGP Timers Local Bus Interface Pwr Mgmnt NOR & NAND Data Out Data In Flash Interfaces and Control External I/O Req/Ack External I/O Address External I/O External I/O External I/O Slave Addr & Byte Enables RO Packet Arguments from MSR Master Addr & Byte Enables Local Bus Handshake Chip Selects Address Decode and Legacy Decode MSRs Standard MSRs Local BARs, Compares, Address Hits * GeodeLink Adapter DIVIL *Data Out Mux not shown. and Miscellaneous |
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