PM6670AS datasheet(38/54 Pages) STMICROELECTRONICS

部件名	PM6670AS

功能描述	Complete DDR2/3 memory power supplies controller

PDF	54 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

38 / 54 page

Device description

PM6670AS

38/54

7.3

S3 and S5 power management pins

According to DDR2/3 memories supply requirements, the PM6670AS 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 PM6670AS 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 4. S3 and S5 Sleep-states decoding

System State

VDDQ

VTTREF

VTT

S0 (Full-On)

OnOnOn

S3 (Suspend-To-RAM)

Off (Hi-Z)

S4/S5 (Suspend-To-Disk)

Off (Discharge)

PM6670AS 数据表(PDF) 38 Page - STMicroelectronics