SST55LD019A Silicon Storage Technology, Inc., SST55LD019A Datasheet - Page 21

• Manufacturer Part Number: SST55LD019A
• Description: Ata Flash Disk Controllersst's Ata Flash Disk Controller is The Heart of a High Performance, Flash Media-based Data Storage System. The Ata Flash Disk Controller Recognizes The Control, Address, And Data Signals on The Ata/ide Bus And Translates Them
• Manufacturer: Silicon Storage Technology, Inc.

ATA Flash Disk Controller
SST55LD019A / SST55LD019B / SST55LD019C
11.1.2.11 Drive Address Register (Read Only)
This register contains the inverted drive select and head select addresses of the currently selected drive. The bits
in this register are as follows:
11.1.2.12 Command Register (Write Only)
This register contains the command code being sent to the drive. Command execution begins immediately after
this register is written. The executable commands, the command codes, and the necessary parameters for each
command are listed in Table 11-2.
©2004 Silicon Storage Technology, Inc.
Symbol
-WTG
-HS3
-HS2
-HS1
-HS0
-DS1
-DS0
D7
X
-WTG
Function
This bit is 0 when a Write operation is in progress, otherwise, it is 1.
This bit is the negation of bit 3 in the Drive/Head register.
This bit is the negation of bit 2 in the Drive/Head register.
This bit is the negation of bit 1 in the Drive/Head register.
This bit is the negation of bit 0 in the Drive/Head register.
This bit is 0 when drive 1 is active and selected.
This bit is 0 when drive 0 is active and selected.
D6
-HS3
D5
-HS2
D4
21
-HS1
D3
-HS0
D2
-DS1
D1
-DS0
Advance Information
D0
S71241-02-000
Reset Value
x111 1110b
4/04