USB97C201-MN SMSC [SMSC Corporation], USB97C201-MN Datasheet - Page 53

• Manufacturer Part Number: USB97C201-MN
• Description: USB 2.0 ATA/ ATAPI Controller
• Manufacturer: SMSC [SMSC Corporation]

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