TELEFUNKEN Semiconductors
U6206B
SF:
Scaling factor of programmable 15-bit-
divider
PSF: Scaling factor of prescaler
Oscillator Frequency Calculation
fosc = fref * SF * PSF
fosc: Locked oscillator frequency
fref : Reference frequency 4MHz /512 =
7.8125 kHz
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...
8
9
1...
8
9
1...
8
9
STOP
95 10724
Figure 2.
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
SDA
W STA
95 10725
t
S STA
SCL
t
LOW
t
HIGH
t
R
t
F
t
S STO
t
H STA
t
S DAT
START
CLOCK
t
H DAT
STOP
DATACHANGE
Figure 3.
t
S STA
t
W STA
t
H STA
t
LOW
t
HIGH
– Set – up time start
– Waiting time start
– Hold time start
– ”L” – Pulse width clock
– ”H” – Pulse width clock
t
S DAT
t
H DAT
t
S STO
t
R
t
F
– Set – up time data
– Hold time data
– Set – up time stop
– Rise time
– Fall time
5 (8)
Rev. A1: 25.10.1995
TEMIC [ TEMIC SEMICONDUCTORS ]
