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參數資料
| 型號： | U6225B |
| 英文描述： | 2.9 GHz PLL for SAT TV Receiver with Universal Bus |
| 中文描述： | 2.9 GHz的鎖相環通用總線的衛星電視接收器 |
| 文件頁數： | 7/12頁 |
| 文件大小： | 166K |
| 代理商： | U6225B |
TELEFUNKEN Semiconductors
U6225B
Rev. A1: 25.10.1995
7 (12)
I
2
C-Bus 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
95 10731
9
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 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 = Prgr. divider byte 2
CB1 = Control byte 1
CB2 = Control byte 2
STOP = Stop condition
I
2
C-Bus Timing
SDA
SCL
t
t
t
t
t
t
t
t
t
t
R
F
S STP
H DAT
S DAT
HIGH
LOW
S STT
W STT
H STT
START
CLOCK
DATACHANGE
STOP
95 10732
Figure 4.
Parameters
Symbol
tR
tF
fSCL
tHIGH
tLOW
tH STT
tW STT
tS STT
tS STP
tS DAT
tH DAT
Min.
Typ.
Max.
15
15
100
Unit
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
s
s
0
4
4
4
4
4
4
kHz
s
s
s
s
s
s
s
s
0.3
0
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