Z86C83 Datasheet, PDF (32/46 Pages) Zilog, Inc. – Z8 MCU MICROCONTROLLERS

Z86C83/C84
Z8^® MCU Microcontrollers
The D/A conversion for DAC1 is driven by writing 8-bit data
to the DAC1 data register (Bank C, Register 06H). The
D/A conversion for DAC 2 is controlled by the DAC2 data
register (Bank C, Register 07H). Each DAC data register
is initialized to midrange 80H on power-up.
There are two DAC control registers: DACR1 (Bank C,
Register 04H) for DAC1, and DACR2 (Bank C, Register
05H) for DAC2. Control register bits 0 and 1 set the DAC
gain. When DAC data is 80H, the DAC output is constant
for any gain setting (Figure 29 and Figure 31).
DACR2 Bank C, Register 5
D7 D6 D5 D4 D3 D2 D1 D0
DAC2 Gain
0 0 1X
0 1 1/2 X
1 0 1 Not Used
1 1 1/4 X
DAC2 Enable
0 Disable
1 Enable
Reserved (Must be 0)
DACR1 Bank C, Register 4
D7 D6 D5 D4 D3 D2 D1 D0
DAC1 Gain
0 0 1X
0 1 1/2 X
1 0 1 Not Used
1 1 1/4 X
DAC1 Enable
0 Disable
1 Enable
Reserved (Must be 0)
Figure 31. D/A 2 Control Register
DAC2 Bank C, Register 7
D7 D6 D5 D4 D3 D2 D1 D0
= Low Level
= High Level
Figure 32. D/A 2 Data Register
Figure 29. D/A 1 Control Register
DAC1 Bank C, Register 6
D7 D6 D5 D4 D3 D2 D1 D0
0 = Low Level
1 = High Level
Figure 30. D/A 1 Data Register
32
DS96DZ80203