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M32C/86 Datasheet(PDF) 282 Page - Renesas Technology Corp |
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M32C/86 Datasheet(HTML) 282 Page - Renesas Technology Corp |
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282 / 505 page  Page 259 9 7 4 f o 5 0 0 2 , 8 0 . p e S 0 0 . 1 . v e R 0 0 1 0 - 4 0 2 0 B 9 0 J E R 21. X/Y Conversion ) T 6 8 / C 2 3 M , 6 8 / C 2 3 M ( p u o r G 6 8 / C 2 3 M 21. X/Y Conversion The X/Y conversion rotates a 16 x 16 matrix data by 90 degrees and inverses high-order bits and low-order bits of a 16-bit data. Figure 21.1 shows the XYC register. The 16-bit XiR register (i=0 to 15) and 16-bit YjR register (j=0 to 15) are allocated to the same address. The XiR register is a write-only register, while the YjR register is a read-only register. Access the XiR and YjR registers from an even address in 16-bit units. Performance cannot be guaranteed if the XiR and YiR registers are accessed in 8-bit units. Function X/Y Control Register Bit Name Bit Symbol Symbol Address After Reset XYC 02E016 XXXX XX002 RW Read Mode Set Bit Write Mode Set Bit Noting is assigned. When write, set to "0". When read, its content is indeterminate. 0 : Data conversion 1 : No data conversion 0 : No bit alignment conversion 1 : Bit alignment conversion XYC1 (b7 - b2) XYC0 RW RW b7 b6 b5 b4 b3 b2 b1 b0 Figure 21.1 XYC Register |
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