Samsung WA31273A Technical Manual page 66

AT INTERFACE and ATA COMMANDS
6-4-4-6 Word 23-26 : Firmware revision
If word 23 of this field is 0000h, then the firmware revision is not specified and the
definition of the remaining words of this field are vendor specific.
If word 23 of this field is not equal to 0000h, then this field contains the firmware
revision of the device. The contents of this field is an ASCII character string of eight
bytes. The device shall pad the character string with spaces (20h), if necessary, to ensure
that the string is the proper length.
6-4-4-7 Word 27-46 : Model Number
If word 27 of this field is 0000h, then the model number is not specified and the
definition of the remaining words of this field are vendor specific.
If word 27 this field is not equal to 0000h, then this field contains the model number of
the device. The contents of this field is an ASCII character string of forty bytes. The
device shall pad the character string with spaces (20h), if necessary, to ensure that the
string is the proper length.
6-4-4-8 Word 47 : Read/Write Multiple support
Bits 7-0 of this word define the maximum number of sectors per block that the device
supports for READ/WRITE MULTIPLE commands. If a device supports the
READ/WRITE MULTIPLE and SET MULTIPLE MODE commands, these bits contain a
non-zero value. If the device does not support the READ/WRITE MULTIPLE and SET
MULTIPLE MODE commands, these bits shall be zero.
6-4-4-9 Word 49 : Capabilities
6-4-4-9-1 Standby Timer Support
Bit 13 of word 49 is used to determine whether a device utilizes the Standby Timer
values defined in this standard. If bit 13 is set to one, then the device utilizes the Standby
Timer values as specified in Table 13 (see clause 8.11). If bit 13 is set to zero, the timer
values utilized are vendor specific.
6-4-4-9-2 IORDY Support
Bit 11 of word 49 is used to help determine whether a device supports IORDY. If this bit
is set to one, then the device supports IORDY operation. If this bit is zero, the device
may support IORDY. This insures backward compatibility. This device supports PIO
Mode 3, so this bit shall be set.
6-4-4-9-3 IORDY Can Be Disabled
Bit 10 of word 49 is used to indicate a device's ability to enable disable the use of IORDY.
If this bit is set to one, then the device supports the disabling of IORDY. Control of
IORDY is accomplished using the SET FEATURES command.
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22 WA31273A / WA32543A / WA33203A / WA3216A / WA31083A / WA32162A