
U6209B
Preliminary Information
TELEFUNKEN Semiconductors
Rev. A2, 30-Aug-96
7 (11)
Pulse Diagram
Address byte
/ A /
/ A /
1.Byte
/ A /
2.Byte
/ A /
3.Byte
4.Byte
/ A /
SDA
SCL
START
1
2
3
4
5
6
7
8
9
8
1...
9
8
1...
9
1...
8
9
1...
8
STOP
9
95 10724
Figure 3.
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 – PDB1 – PDB2 – STOP
START – ADR – CB1 – CB2 – STOP
START – ADR – CB1 – STOP
Bus Timing
Description
START = Start condition
ADR = Address byte
PDB1 = Programmable divider byte 1
PDB2 = Programmable divider byte 2
CB1 = Control byte 1
CB2 = Control byte 2
STOP = Stop condition
SDA
SCL
t
t
t
t
t
t
t
t
t
t
R
F
S STO
H DAT
S DAT
DATACHANGE
HIGH
LOW
S STA
W STA
H STA
START
CLOCK
STOP
95 10725
Figure 4.
t
S STT
t
W STT
t
H STT
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
Parameters
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
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Bus timing
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Waiting time start
Set up time start
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tWStt
tSSTT
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s
s
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s
s
4
4
4
4
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