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TMPR4955AF датащи(PDF) 100 Page - Toshiba Semiconductor |
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TMPR4955AF датащи(HTML) 100 Page - Toshiba Semiconductor |
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100 / 168 page ![]() Chapter 6 TX4955A System Interface 6-28 6.2.11.4 Write requests Figure 6.2.26 illustrates the SysCmd format for write requests. Table 6.2.11 indicates the methods of specifying write properties using SysCmd(4:3). Table 6.2.12 indicates the methods of specifying replacements properties using SysCmd(2:0) for block write requests. Table 6.2.13 indicates the methods of specifying the data size using SysCmd(2:0) for write requests. 87 5 4 0 0 010 Write request specific Figure 6.2.26 SysCmd Bus Bit Specification for Write Requests Table 6.2.11 Methods of Specifying SysCmd(4:3) for Write Requests SysCmd(4:3) Write Properties 0 ∼ 1 Reserved 2 Block write 3 Word or partial word write Table 6.2.12 Specification Method of SysCmd(2:0) for Block Write Requests SysCmd(2) Reserved SysCmd(1:0) Write Block Size 0 Reserved 18 words 2 ∼ 3 Reserved Table 6.2.13 Methods for Specifying SysCmd(2:0) for Word or Partial Word Write Requests SysCmd(2:0) Write Data Size 0 1 byte valid (byte) 1 2 bytes valid (half-word) 2 3 bytes valid (tri-byte) 3 4 bytes valid (word) 4 Reserved 5 Reserved 6 Reserved 7 Reserved |
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