User guide

203 Series Industrial Grade 2.5" FlashDrive Product Manual v2.0Cactus Technologies

This section denes the software requirements and the format of the commands the host sends

to the Industrial FlashDrive products. Commands are issued by loading the required registers in

the command block with the supplied parameters, and then writing the command code to the

Command Register. The manner in which a command is accepted varies. There are three classes

(see Table 5-10) of command acceptance, all dependent on the host not issuing commands unless

the drive is not busy. (The BUSY bit in the status and alternate status registers is 0.)

• Upon receipt of a Class 1 command, the drive sets the BUSY bit within 400 nsec.

• Upon receipt of a Class 2 command, the drive sets the BUSY bit within 400 nsec, sets up the

sector buer for a write operation, sets DRQ within 700 µsec, and clears the BUSY bit within 400

nsec of setting DRQ.

• Upon receipt of a Class 3 command, the drive sets the BUSY bit within 400 nsec, sets up the

sector buer for a write operation, sets DRQ within 20 msec (assuming no re-assignments), and

clears the BUSY bit within 400 nsec of setting DRQ.

ATA Command Set

5.1.

Table 5-10 summarizes the supported ATA command set with the paragraphs that follow describing

the individual commands and the task le for each.

ATA

Command Description05

Class COMMAND Code FR SC SN CY DH LBA

1 Check Power Mode E5h or 98h - - - - D -

1 Execute Drive Diagnostic 90h - - - - D -

1 Erase Sector(s) C0h - Y Y Y Y Y

2 Format Track 50h - Y - Y Y Y

1 Identify Drive ECh - - - - D -

1 Idle E3h or 97h - Y - - D -

1 Idle Immediate E1h or 95h - - - - D -

1 Initialize Drive Parameters 91h - Y - - Y -

1 Read Buer E4h - - - - D -

1 Read Multiple C4h - Y Y Y Y Y

1 Read Long Sector 22h or 23h - - Y Y Y Y

1 Read Sector(s) 20h or 21h - Y Y Y Y Y

1 Read Verify Sector(s) 40h or 41h - Y Y Y Y Y

1 Recalibrate 1Xh - - - - D -

1 Request Sense 03h - - - - D -

1 Seek 7Xh - - Y Y Y Y

1 Set Features EFh Y - - - D -

1 Set Multiple Mode C6h - Y - - D -

Table 5-10. ATA Command Set