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PT8146L Datasheet(PDF) 7 Page - Princeton Technology Corp |
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PT8146L Datasheet(HTML) 7 Page - Princeton Technology Corp |
7 / 27 page Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw PT8146 V1.1 - 7 - February, 2006 8-Bit 12-Ch I/O DAC PT8146 I/O EXPANDER (CHANNEL SELECT = “1101”): SERIAL → PARALLEL CONVERSION Performs parallel conversion of data bits D4 to DF for output on pins D0 to D11. Note that only those pins designated for output in the ESR (expander status register) are output. Shift register DF DE DD DC DB DA D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Parallel I/O pins (output state) D 11 D 10 D 9 D 8 D 7 D 6 D 5 D 4 D 3 D 2 D 1 D 0 I/O EXPANDER (CHANNEL SELECT = “1110”): PARALLEL → SERIAL CONVERSION Writes data from D0 to D11 pins to bits D4 to DF in the shift register. Data is output to the SO pin on the shift clock (CLK) signal. (The first 4 bits output data D0 to D3, so the converted output should be read as data bits 5 through 16.) Note that the data value is “0” for pins designated for output in the ESR (expander status register) as well as analog output pins. Shift register DF DE DD DC DB DA D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Parallel I/O pins (output state) D 11 D 10 D 9 D 8 D 7 D 6 D 5 D 4 D 3 D 2 D 1 D 0 |
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