M16C User Manual.pdf

D-A ConverterMitsubishi microcomputersM16C / 62 GroupSINGLE-CHIP 16-BIT CMOS MICROCOMPUTERD-A control registerb7 b6 b5 b4 b3 b2 b1 b0Symbol Address When resetDACON 03DC16 0016Bit symbol Bit name Function R WDA0EDA1ED-A0 output enable bitD-A1 output enable bit0 : Output disabled1 : Output enabled0 : Output disabled1 : Output enabledNothing is assigned.In an attempt to write to these bits, write “0”. The value, if read, turns out to be “0”D-A registerb7b0Symbol Address When resetDAi (i = 0,1) 03D816, 03DA16 IndeterminateFigure 1.21.2. D-A control registerOutput value of D-A conversionFunctionR W D-A0 output enable bit“0”RRRRRRR2RDA0“1”2R2R2R2R2R2R2R2RMSBLSBD-A0 register0“0” “1”AVSSVREFNote 1: The above diagram shows an instance in which the D-A register is assigned 2A16.Note 2: The same circuit as this is also used for D-A1.Note 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 0016so that no current flows in the resistors Rs and 2Rs.Figure 1.21.3. D-A converter equivalent circuit164