U6225B Datasheet, PDF (7/12 Pages) TEMIC Semiconductors – 2.9 GHz PLL for SAT TV Receiver with Universal Bus

TELEFUNKEN Semiconductors
U6225B
I²C-Bus 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...
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
Figure 3.
Description
START = Start condition
ADR = Address byte
PDB1 = Progr. divider byte 1
PDB2 = Prgr. divider byte 2
CB1 = Control byte 1
CB2 = Control byte 2
STOP = Stop condition
8 9 STOP
95 10731
I²C-Bus Timing
t _{W STT}
SDA
t
S STT
SCL
t
LOW
t
HIGH
t
t
R
F
95 10732
t
S STP
START
t _{H STT}
CLOCK
Rise time SDA, SCL
Fall time SDA, SCL
Clock frequency SCL
Clock ‘H’ pulse
Clock ‘L’ pulse
Hold time start
Waiting time start
Set-up time start
Set-up time stop
Set-up time data
Hold time data
Parameters
t _{S DAT}
t _{H DAT}
DATACHANGE
Figure 4.
Symbol Min.
Typ.
tR
tF
fSCL
0
tHIGH
4
tLOW
4
tH STT
4
tW STT
4
tS STT
4
tS STP
4
tS DAT 0.3
tH DAT
0
STOP
Max. Unit
15
ms
15
ms
100
kHz
ms
ms
ms
ms
ms
ms
ms
ms
Rev. A1: 25.10.1995
7 (12)