VSC7173XYI 查看數據表（PDF） - Maxim Integrated

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VSC7173XYI

Enhanced 2:1 Port Selector and 1:2 Port Multiplier for Serial ATA and Serial Attached SCSI

Maxim Integrated 

VSC7173

Data Sheet

Reset State

The power-up state of the VSC7173 is based on the PORTSEL0 and PORTSEL1 input signals. When in level-

sensitive mode, the active port connected to port 2 is controlled directly by the PORTSEL0 input. This is the same

behavior as the normal operating condition described above. When in edge-sensitive mode, the active port connected

to port 2 is defined in Table 3. The state diagram in Figure 3 indicates the same result in a different format.

Table 3. Power-up State (Edge-Sensitive Mode)

PORTSEL0

0

1

0

1

PORTSEL1

0

0

1

1

Active Port

Port 0 selected

Port 0 selected

Port 1 selected

Port 0 selected

P0SLTD Output

1

1

0

1

Reset=1

Reset State

Reset=1

(PORTSEL0=1, PORTSEL1=1

or PORTSEL1=0)

and Reset=0

PORTSEL0=0, PORTSEL1=1

and Reset=0

Port 0 Selected

PORTSEL0

PORTSEL1

Port 1 Selected

Figure 3. Reset State Machine (Edge-Sensitive Mode)

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Confidential

Revision 4.1

May 23, 2005

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