U4256BM-R Datasheet, PDF (12/19 Pages) ATMEL Corporation – Frequency Synthesizer for Radio Tuning

Figure 14. 3-wire Bus Timing Diagram
t_R
Enable
Data
Clock
t_S
t_R
t_HDA
t_S
t_R
t_{H tL}
t_F
t_HEN
t_F
t_F
V_HIGH
V_LOW
V_HIGH
V_LOW
V_HIGH
V_LOW
Figure 15. 3-wire Pulse Diagram
16-bit command
EN
DATA LSB
CLK
BYTE 1
24-bit command
EN
DATA LSB
CLK
BYTE 1
MSB LSB
MSB LSB
BYTE 2
MSB
BYTE 2
MSB LSB
BYTE 3
MSB
e.g. R-Divider
2⁰
2¹
2²
2³
2⁴
2⁵
2⁶
2⁷
2⁸
2⁹
2 ¹⁰
2 ¹¹
2 ¹² 2 ¹³ 2¹⁴
2 ¹⁵
0P-2
P1 -2
OSCB
P2 -2
IPD
R-Divider
DAC3
Status 0
00
Addr.
12 U4256BM-R
4562C–AUDR–08/04