Interface

5.5 Power-on and COMRESET

Figure 5.20 shows the power-on sequence, and Figure 5.21 shows the

COMRESET sequence.

Immediately after power-on or COMRESET, the host sets 0x7Fh in the Status field of the Shadow Block Register and 0xFFh in other fields. After the power-on sequence shown below and after communication with the SATA interface is established, the host sets 0xFFh in the Status field of the Shadow Block Register. The device completes the power-on sequence within 10 ms so that communication with the SATA interface can be established.

 

Host

Host

Host

 

 

 

power

releases

 

Host

 

on

ComReset

ComWake

 

Align

Host

 

 

Host

 

Host

Host

 

power

releases

Host

calibrate

off

ComReset

ComWake

data

Host TX

 

 

 

 

 

(Device

 

 

 

 

 

RX)

 

 

 

 

 

Device

 

 

 

 

 

TX (Host

 

 

 

 

 

RX)

 

 

 

 

 

 

Device

Device

 

Device

Device

 

ComInit

 

Calibrate

Align

 

power

 

 

off

Device

Device

Device

Device

 

 

releases

ComWake

data

 

 

power

 

 

ComInit

 

 

 

 

on

 

 

 

 

 

 

 

Figure 5.20 Power-on sequence

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Fujitsu MHY2160BH, MHY2200BH, MHY2250BH, MHY2100BH, MHY2120BH, MHY2080BH, MHY2060BH Power-on and Comreset, Power-on sequence