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PC87413 Datenblatt(PDF) 85 Page - National Semiconductor (TI) |
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PC87413 Datenblatt(HTML) 85 Page - National Semiconductor (TI) |
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85 / 257 page ![]() 3.0 Device Architecture and Configuration (Continued) Revision 1.2 85 www.national.com 3.15.13 X-Bus Memory Base Address High Byte Register (XMEMBAH) This register describes the high byte for the user-defined memory zones mapped to the X-Bus (decoded as bits 31 to 24 of the 32-bit address range; bits 15-0 are 0). This register is reset by hardware to 00h. Power Well:VSB Location:Index F9h Type: R/W or RO 3.15.14 X-Bus Memory Base Address Low Byte Register (XMEMBAL) This register describes the low byte for the user-defined memory zones mapped to the X-Bus (decoded as bits 23 to 16 of the 32-bit address range; bits 15 to 0 are 0). This register is reset by hardware to 00h. Power Well:VSB Location:Index FAh Type: R/W or RO Bit 76543210 Name MEMBAH Reset 00000000 Bit Description 7-0 MEMBAH (User-Defined Memory Zone Address High). Defines the upper eight bits of the user-defined memory block base address. The base address must be aligned on the selected block size. Bit 76543210 Name MEMBAL Reset 00000000 Bit Description 7-0 MEMBAL (User-Defined Memory Zone Address Low). Defines the lower eight bits of the user-defined memory block base address. The base address must be aligned on the selected block size. |
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