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PC87591S-VPC датащи(PDF) 83 Page - National Semiconductor (TI) |
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PC87591S-VPC датащи(HTML) 83 Page - National Semiconductor (TI) |
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83 / 437 page ![]() 4.0 Embedded Controller Modules (Continued) Revision 1.07 83 www.national.com 4.1.10 BIU Registers For a summary of the abbreviations used for Register Type, see “Register Abbreviations and Access” on page 34. BIU Register Map BIU Configuration Register (BCFG) The BCFG register controls the configuration of common features to all zones. On reset, this register is initialized to 0716. Location: Index 00 F98016 Type: R/W Mnemonic Register Name Type BCFG BIU Configuration R/W IOCFG I/O Zone Configuration R/W SZCFGn Static Zone Configuration R/W Bit 76543210 Name Reserved ISTL OBR EWR Reset 00000111 Bit Description 0 EWR (Early Write). 0: Late write 1: Early write 1 OBR (Observability). Determines if the address and status of internal accesses are observable. 0: Not observable (no toggle of external buses) 1: Observable (external buses toggle) 2 ISTL (Internal Stall). Determines if the internal bus is stalled while the BIU is busy. 0: Internal bus activity not stalled when BIU is busy 1: Stall internal bus activity when the external bus is busy 7-3 Reserved. |
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