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USB97C201 Datasheet(PDF) 53 Page - SMSC Corporation

Part # USB97C201
Description  USB 2.0 ATA/ ATAPI Controller
PDF  59 Pages
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Manufacturer  SMSC [SMSC Corporation]
Direct Link  http://www.smsc.com
Logo SMSC - SMSC Corporation

USB97C201 Datasheet(HTML) 53 Page - SMSC Corporation

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SMSC DS – USB97C201
Page 53
Rev. 03/25/2002
PRELIMINARY
RAMWR_A=0
RAMWR_B=0
RAMRD_A=1
RAMRD_B=1
RAMWR_A=1
& count<>0 ?
No
RAMWR_B=1
& count<>0 ?
No
Yes
XFER COUNT
RAMWRBC_B1/2 ->
RAMRDBC_B1/2;
RAMRD_TOGGLE=1
Yes
RAMRD_B=1?
RAMWR_A=1
& count<>0 ?
No
No
Yes
Yes
CLR RAMWR_B
RAMRD_B=1?
No
Yes
RAMWR_TOGGLE
=1
& CLR RAMWR_B
XFER COUNT
RAMWRBC_A1/2 ->
RAMRDBC_A1/2;
RAMRD_TOGGLE=0;
RAMRD_A
=1?
RAMWR_B=1
& count<>0 ?
No
No
Yes
RAMRD_A
=1?
No
CLR
RAMWR_A
Yes
RAMWR_TOG
GLE=0 &
CLR
RAMWR_A
Yes
AUT0_TRANS->1
FIGURE 5 - AUTOMATIC DATA TRANSFER OPERATION
The trapezoidal shapes represent actions taken by the state machine.



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