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TMPR4925 Datasheet(PDF) 310 Page - Toshiba Semiconductor |
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TMPR4925 Datasheet(HTML) 310 Page - Toshiba Semiconductor |
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310 / 590 page  Chapter 10 PCI Controller 10-48 10.4.22 PCI Bus Arbiter Request Port Register (PBAREQPORT) 0xD100 This register sets the correlation between each PCI Bus request source (PCI Controller and REQ[3:0]) and each Internal PCI Bus Arbiter Request port (Master A - D, W - Z) (see Figure 10.3.9). When changing these settings, each of the eight field values must always be set to different values. After changing this register, the Broken Master Register (BM) value becomes invalid since the bit mapping changes. This register is only valid when using the on-chip PCI Bus Arbiter. 31 30 28 27 26 24 23 22 20 19 18 16 Reserved ReqAP Reserved ReqBP Reserved ReqCP Reserved ReqDP R/W R/W R/W R/W : Type 111 110 101 100 : Initial value 15 14 12 11 10 8 7 6 4 3 2 0 Reserved ReqWP Reserved ReqXP Reserved ReqYP Reserved ReqZP R/WR/W R/WR/W : Type 011 010 001 000 : Initial value Bits Mnemonic Field Name Description 31 Reserved 30:28 ReqAP Request A Port Request A Port (Initial value: 111, R/W) Sets the PCI Bus Master that connects to the Internal PCI Bus Arbiter Request A Port (Master A). 111: Makes the PCI Controller Master A. 110: Reserved 101: Reserved 100: Reserved 011: Makes REQ*[3] Master A. 010: Makes REQ*[2] Master A. 001: Makes REQ*[1] Master A. 000: Makes REQ*[0] Master A. 27 Reserved 26:24 ReqBP Request B Port Request B Port (Initial value: 110, R/W) Sets the PCI Bus Master that connects to the Internal PCI Bus Arbiter Request B Port (Master B). 111: Makes the PCI Controller Master B. 110: Reserved 101: Reserved 100: Reserved 011: Makes REQ*[3] Master B. 010: Makes REQ*[2] Master B. 001: Makes REQ*[1] Master B. 000: Makes REQ*[0] Master B. 23 Reserved 22:20 ReqCP Request C Port Request C Port (Initial value: 101, R/W) Sets the PCI Bus Master that connects to the Internal PCI Bus Arbiter Request C Port (Master C). 111: Makes the PCI Controller Master C. 110: Reserved 101: Reserved 100: Reserved 011: Makes REQ*[3] Master C. 010: Makes REQ*[2] Master C. 001: Makes REQ*[1] Master C. 000: Makes REQ*[0] Master C. 19 Reserved Figure 10.4.22 PCI Bus Arbiter Request Port Register (1/2) |
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