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M306V2EEFS датащи(PDF) 165 Page - Renesas Technology Corp |
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M306V2EEFS датащи(HTML) 165 Page - Renesas Technology Corp |
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165 / 271 page ![]() Rev.1.40 Oct 06, 2004 page 165 of 269 M306V2ME-XXXFP, M306V2EEFP VCC (VREF) VSS 2R R 2R R 2R R 2R R 2R R 2R R 2R R 2R 2R DA0 MSB LSB D-A0 output enable bit "0" "1" D-A0 register0 Note 1: The above diagram shows an instance in which the D-A register is assigned 2A16. 2: The same circuit as this is also used for D-A1. 3: To reduce the current consumption when the D-A converter is not used, set the D-A output enable bit to 0 and set the D-A register to 0016 so that no current flows in the resistors Rs and 2Rs. D-A register i (i = 0, 1) Symbol Address When reset DAi (i = 0,1) 03D816, 03DA16 Indeterminate W R b7 b0 Function R W Output value of D-A conversion Figure 2.13.2 D-A control register D-A control register Symbol Address When reset DACON 03DC16 0016 b7 b6 b5 b4 b3 b2 b1 b0 D-A0 output enable bit DA0E Bit symbol Bit name Function R W 0 : Output disabled 1 : Output enabled D-A1 output enable bit 0 : Output disabled 1 : Output enabled DA1E Nothing is assigned. In an attempt to write to these bits, write “0.” The value, if read, turns out to be “0.” Figure 2.13.3 D-A register i (i = 0 and 1) Figure 2.13.4 D-A converter equivalent circuit |
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