Cosel CHS series, Руководство по связи

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1.2 PMBus Communication connections method
The figure and table below show recommended resistors value for hard wiring PMBus addresses.
#
1
2
3
4
5
6
*1
：
Connecting C2 as Power-Good function
*2
：
Refer to clause 1.4 PMBus communication
pull-up resistor
*3
：
refer to clause 1.5 address setting
1.3 PMBus communication cable pattern example
When connecting the PMBus communication cable, please make sure design to minimize
noise from outside and crosstalk by positioning Sig_GND between Data bus and Clock bus
as shown figure 1-3.
Also, do the right setting for pull-up resistor as parasitic capacitance is happened by way of
shielding and length of cabling. (refer to clause 1.4)
R4
R5,R7
Figure 1-3 Pattern example
*
3
Figure 1-2 PMBus interface cable chart
R2
*
3
component
Setting value
R6,R8
R1
10k
Ω
(recommend)
*
2
10k
Ω
(recommend)
*
1
*
2
*
2
R3
Sig_GND
Data Bus
Clock Bus
R1 R2 R3 R4
R5 R6
R7 R8
●
●
Sig_GND
Sig_GND
C2
SMBAlert
Clock
Data Addr0
C2
SMBAlert
Clock
Data
Addr1
Addr0
Addr1
スレーブデバイス2
(CHS)
スレーブデバイス1
(CHS)
マスター
デバイス
●
● ●
● ●
●
● ●
●
●
●
●
プルアップ電圧
●
●
●
●
●
●
●
●
Position Sig_GND pattern
between clock bus and Data bus
Slave device 1
(CHS)
Master
device
pull-up
Slave device 2
(CHS)
Applications manual
For CHS300/400/500-
I
series
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