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LTC1090CSW датащи(PDF) 14 Page - Linear Technology |
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LTC1090CSW датащи(HTML) 14 Page - Linear Technology |
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14 / 28 page ![]() 14 LTC1090 1090fc 4. CS Low During Conversion In the normal mode of operation, CS is brought high during the conversion time (see Figure 3). The serial port ignores any SCLK activity while CS is high. The LTC1090 will also operate with CS low during the conversion. In this mode, SCLK must remain low during the conversion as shown in Figure 4. After the conversion is complete, the DOUT line will become active with the first output bit. Then the data transfer can begin as normal. 5. Microprocessor Interfaces The LTC1090 can interface directly (without external hard- ware) to most popular microprocessor (MPU) synchronous Figure 3. CS High During Conversion Figure 4. CS Low During Conversion APPLICATIO S I FOR ATIO LTC1090 • AI09 B9 SHIFT RESULT OUT AND NEW ADDRESS IN B8 B7 B6 B5 B4 B3 B2 B1 B0 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 ODD/ SIGN SGL/ DIFF SEL 1 DOUT SCLK SEL 0 UNI MSBF WL1 WL0 ODD/ SIGN SGL/ DIFF SEL 1 SEL 0 UNI MSBF WL1 WL0 tSMPL SAMPLE ANALOG INPUT 40 TO 44 ACLK CYCLES SHIFT MUX ADDRESS IN DIN CS DON’T CARE LTC1090 • AI10 B9 SHIFT RESULT OUT AND NEW ADDRESS IN B8 B7 B6 B5 B4 B3 B2 B1 B0 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 ODD/ SIGN SGL/ DIFF SEL 1 SCLK DOUT SEL 0 UNI MSBF WL1 WL0 ODD/ SIGN SGL/ DIFF SEL 1 SEL 0 UNI MSBF WL1 WL0 tSMPL SAMPLE ANALOG INPUT 40 TO 44 ACLK CYCLES SCLK MUST REMAIN LOW SHIFT MUX ADDRESS IN DIN CS DON’T CARE |
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