Samsung WA31273A Technical Manual page 88

AT INTERFACE and ATA COMMANDS
d) The host writes one sector of data via the Data Register.
e) The drive clears DRQ and sets BSY.
f) When the drive has completed processing of the sector, it clears BSY and asserts
INTRQ. If transfer of another sector is required, the drive also sets DRQ.
g) After detecting INTRQ, the host reads the Status Registers.
h) The drive clears the interrupt.
i) If transfer of another sector is required, the above sequence is repeated from d).
6-6-2-1 PIO Write Command
a) b)
Setup Issue
Command
BSY=0
DRDY=1
6-6-2-2 PIO Write Aborted Command
a)
Setup Issue
Command
BSY=0
DRDY=1
6-
44 WA31273A / WA32543A / WA33203A / WA3216A / WA31083A / WA32162A
Transfer
Data
BSY=1 BSY=0 BSY=1
DRQ=
1 DRQ=0
b) e)
Read
Status
BSY=1 BSY=0
Assert
INTRQ INTRQ
e)
Read Transfer
Status Data
BSY=0
DRQ=1
Assert Negate
INTRQ INTRQ
Negate
e)
Read
==== Status
BSY=1 BSY=0
DRQ=0
Assert Negate
INTRQ INTRQ