U6206B Datasheet, PDF (5/8 Pages) TEMIC Semiconductors – 1.3 GHz PLL for TV- and VCR- Tuner

TELEFUNKEN Semiconductors
U6206B
Oscillator Frequency Calculation
fosc = fref * SF * PSF
fosc: Locked oscillator frequency
fref : Reference frequency 4MHz /512 =
7.8125 kHz
SF: Scaling factor of programmable 15-bit-
divider
PSF: Scaling factor of prescaler
Pulse Diagram
ADDRESS BYTE
/ A / 1.BYTE / A / 2.BYTE / A / 3.BYTE / A / 4.BYTE / A /
SDA
SCL
START 1 2 3 4 5 6 7 8 9 1...
8 9 1...
Figure 2.
8 9 1...
8 9 1...
8 9 STOP
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Data transfer examples
START – ADR – PDB1 – PDB2 – CB1 – CB2 – STOP
START – ADR – CB1 – CB2 – –PDB1 – PDB2 – STOP
START – ADR – PDB1 – PDB2 – CB1 – STOP
START – ADR – CB1 – CB2 – PDB1 – STOP
START – ADR – PDB1 – PDB2 – STOP
START – ADR – CB1 – CB2 – STOP
START – ADR – CB1 – STOP
Description
START= Start condition
ADR= Address byte
PDB1= Progr.divider byte 1
PDB2= Progr. divider byte 2
CB1= Control byte 1
CB2= Control byte 2
STOP= Stop condition
Bus Timing
t _{W STA}
SDA
t
S STA
t
LOW
t
HIGH
t
t
R
F
SCL
t
H STA
START
CLOCK
t
S DAT
t
H DAT
DATACHANGE
Figure 3.
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t
S STO
STOP
tS STA
tW STA
tH STA
tLOW
tHIGH
– Set – up time start
– Waiting time start
– Hold time start
– ”L” – Pulse width clock
– ”H” – Pulse width clock
Rev. A1: 25.10.1995
tS DAT
tH DAT
tS STO
tR
tF
– Set – up time data
– Hold time data
– Set – up time stop
– Rise time
– Fall time
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