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XIO2001IPNP датащи(PDF) 111 Page - Texas Instruments |
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XIO2001IPNP датащи(HTML) 111 Page - Texas Instruments |
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111 / 141 page ![]() 111 XIO2001 www.ti.com SCPS212I – MAY 2009 – REVISED JANUARY 2016 Product Folder Links: XIO2001 Submit Documentation Feedback Copyright © 2009–2016, Texas Instruments Incorporated Table 82. Pre-Fetch Agent Request Limits Register Description (continued) BIT FIELD NAME ACCESS DESCRIPTION 7:6 PFA_CPL_CACHE_ MODE RW Completion cache mode. Determines the rules for completing the caching process. 00 = No caching. • Pre-fetching is disabled. • All remaining read completion data will be discarded after any of the data has been returned to the PCI master. 01 = Light caching. • Pre-fetching is enabled. • All remaining read completion data will be discarded after data has been returned to the PCI master and the PCI master terminated the transfer. • All remaining read completion data will be cached after data has been returned to the PCI master and the bridge has terminated the transfer with RETRY. 10 = Full caching. • Pre-fetching is enabled. • All remaining read completion data will be cached after data has been returned to the PCI master and the PCI master terminated the transfer. • All remaining read completion data will be cached after data has been returned to the PCI master and the bridge has terminated the transfer with RETRY. 11 = Reserved. 5:4 RSVD R Reserved. Returns 00b when read. 3:0 PFA_REQ_LENGT H_LIMIT RW Request Length Limit. Determines the number of bytes in the thread that the pre-fetch agent will read for that thread. 0000 = 64 bytes 0001 = 128 bytes 0010 = 256 bytes 0011 = 512 bytes 0100 = 1 Kbytes 0101 = 2 Kbytes 0110 = 4 Kbytes 0111 = 8 Kbytes 1000:1111 = Reserved |
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