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CDCE906 Datasheet(PDF) 13 Page - Texas Instruments

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Part # CDCE906
Description  PROGRAMMABLE 3-PLL CLOCK SYNTHESIZER / MULTIPLIER / DIVIDER
PDF  42 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

CDCE906 Datasheet(HTML) 13 Page - Texas Instruments

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Block Read Programming Sequence
P
S
P
SCLK
SDATA
A
Bit 7 (MSB)
Bit 6
Bit 0 (LSB)
th(SDATA)
tsu(SDATA)
tsu(START)
t(BUS)
th(START)
tr(SM)
tr(SM)
tf(SM)
tf(SM)
tW(SCLH)
tW(SCLL)
tsu(STOP)
VIH(SM)
VIL(SM)
VIH(SM)
VIL(SM)
SMBus Hardware Interface
9
10
SDATA
SCLK
SMB Host
CDCE906
CBUS
CBUS
RP
RP
CDCE906
SCAS814H – NOVEMBER 2005 – REVISED DECEMBER 2007
1
7
1
1
8
1
1
7
1
1
S
Slave Address
Wr
A
CommandCode
A
Sr
Slave Address
Rd
A
8
1
8
1
8
1
1
Byte Count N
A
Data Byte 0
A
- - - - -
Data Byte N–1
A
P
Figure 10. Block Read Protocol
Figure 11. Timing Diagram Serial Control Interface
The following diagram shows how the CDCE906 clock synthesizer is connected to the SMBus. Note that the
current through the pullup resistors (Rp) must meet the SMBus specifications (min 100 µA, max 350 µA). If the
CDCE906 is not connected to the SMBus, then SDATA and SCLK inputs have to be connected with 10-k
Ω
pullup resistors to VCC to avoid floating input conditions.
Figure 12. SMBus Hardware Interface
Copyright © 2005–2007, Texas Instruments Incorporated
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