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H8S2245 Datasheet(PDF) 75 Page - Renesas Technology Corp |
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H8S2245 Datasheet(HTML) 75 Page - Renesas Technology Corp |
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75 / 818 page ![]() Section 2 CPU Rev.3.00 Mar. 26, 2007 Page 33 of 772 REJ09B0355-0300 2.5 Data Formats The CPU can process 1-bit, 4-bit (BCD), 8-bit (byte), 16-bit (word), and 32-bit (longword) data. Bit-manipulation instructions operate on 1-bit data by accessing bit n (n = 0, 1, 2, …, 7) of byte operand data. The DAA and DAS decimal-adjust instructions treat byte data as two digits of 4-bit BCD data. 2.5.1 General Register Data Formats Figure 2.10 shows the data formats in general registers. 76543210 Don't care 70 Don't care 76543210 43 70 70 Don't care Upper Lower LSB MSB LSB Data Type General Register Data Image 1-bit data 1-bit data 4-bit BCD data 4-bit BCD data Byte data Byte data RnH RnL RnH RnL RnH RnL MSB Don't care Upper Lower 43 70 Don't care 70 Don't care 70 Figure 2.10 General Register Data Formats |
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