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TMPR4937 Datasheet(PDF) 307 Page - Toshiba Semiconductor |
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TMPR4937 Datasheet(HTML) 307 Page - Toshiba Semiconductor |
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307 / 552 page  Chapter 10 PCI Controller 10-49 10.4.23 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 10.3.8). When changing the settings of this register, unused ports must be programmed to a reserved value. The eight non-reserved fields must be programmed 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/W R/W R/W R/W : Type 011 010 001 000 : Initial value Bit Mnemonic Field Name Description Read/Write 31 Reserved ⎯ 30:28 ReqAP Request A Port Request A Port (Default: 111) 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. R/W 27 Reserved ⎯ 26:24 ReqBP Request B Port Request B Port (Default: 110) 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. R/W 23 Reserved ⎯ 22:20 ReqCP Request C Port Request C Port (Default: 101) 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. R/W Figure 10.4.21 PCI Bus Arbiter Request Port Register (1/2) |
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