U4256BM-R Datasheet, PDF (8/19 Pages) ATMEL Corporation – Frequency Synthesizer for Radio Tuning

DAC3 (Pin 5)
The DAC3 output voltage can be controlled by the Bits P-2⁰ to P-2² (Bits 66 to 68) as
following:
DAC3 Offset Approximately
0.55 V
1.25 V
1.90 V
2.60 V
3.30 V
4.10 V
4.80 V
5.45 V
B68
B67
B66
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
Figure 8. Internal Components at DAC3
VS
DAC3
EN, DATA, CLK
(Pin 16-18)
All functions can be controlled via a 3-wire bus consisting of ENABLE, DATA and
CLOCK. The bus is designed for microcontrollers which operate with 3 V supply voltage.
Details of the data transfer protocol are shown in the table ‘3-wire Bus Description’.
Figure 9. Internal Components at EN, DATA, CLK
V₅
EN
DATA
CLK
8 U4256BM-R
4562C–AUDR–08/04