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PM6670 데이터시트(PDF) 37 Page - STMicroelectronics

부품명 PM6670
상세설명  Complete DDR2/3 memory power supply controller
PDF  53 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PM6670 데이터시트(HTML) 37 Page - STMicroelectronics

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PM6670
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7.3
S3 and S5 power management pins
According to DDR2/3 memories supply requirements, the PM6670 can manage all S0 to S5
system states by connecting S3-S5 pins to their respective sleep-mode signals in the
notebook's motherboard.
Keeping S3 and S5 high, the S0 (Full-On) state is decoded and the outputs are alive.
In S3 state (S5 = 1, S3 = 0), the PM6670 maintains VDDQ and VTTREF outputs active and
VTT output in high-impedance as needed.
In S4/S5 states (S5 = S3 = 0) all outputs are turned off and, according to DSCG pin voltage,
the proper Soft-End is performed.
Table 11. S3 and S5 Sleep-states decoding
S3
S5
System State
VDDQ
VTTREF
VTT
1
1
S0 (Full-On)
OnOnOn
0
1
S3 (Suspend-To-RAM)
On
On
Off (Hi-Z)
0
0
S4/S5 (Suspend-To-Disk)
Off (Discharge)
Off (Discharge)
Off (Discharge)



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