GLS55VD020-60-C-TQWE-DZ019 Greenliant, GLS55VD020-60-C-TQWE-DZ019 Datasheet - Page 17

• Manufacturer Part Number: GLS55VD020-60-C-TQWE-DZ019
• Description: Flash ATA Media 60MHz 2.7V Commercial
• Manufacturer: Greenliant

Specifications of GLS55VD020-60-C-TQWE-DZ019

• Rohs: yes
• Memory Type: NAND Flash
• Mounting Style: SMD/SMT
• Package / Case: TQFP-100

NAND Controller
GLS55VD020
Feature Register (Write Only) This register provides additional command-specific parameters to the NAND Controller.
Sector Count Register This register contains the numbers of sectors of data requested to be transferred on a Read or
Write operation between the host and the NAND Controller. If the value in this register is zero, a count of 256 sectors is spec-
ified. If the command was successful, this register is zero at command completion. If not successfully completed, the register
contains the number of sectors that need to be transferred in order to complete the request.
Sector Number (LBA 7-0) Register This register contains the starting sector number or bits 7-0 of the Logical Block
Address (LBA) for any NAND Controller data access for the subsequent command.
Cylinder Low (LBA 15-8) Register This register contains the low order 8 bits of the starting cylinder address or bits 15-8
of the Logical Block Address.
Cylinder High (LBA 23-16) Register This register contains the high order bits of the starting cylinder address or bits 23-
16 of the Logical Block Address.
Drive/Head (LBA 27-24) Register The Drive/Head register is used to select the drive and head. It is also used to select
LBA addressing instead of cylinder/head/sector addressing. The bits are defined as follows:
Status & Alternate Status Registers (Read Only) These registers return the NAND Controller status when read
by the host. Reading the Status register does clear a pending interrupt while reading the alternate Status register
does not. The meaning of the status bits are described as follows:
©2010 Greenliant Systems, Ltd.
Symbol
LBA
DRV
HS3
HS2
HS1
HS0
BUSY
D7
D7
1
RDY
Function
LBA is a flag to select either Cylinder/Head/Sector (CHS) or Logical Block Address mode (LBA).
When LBA=0, Cylinder/Head/Sector mode is selected. When LBA=1, Logical Block Address is
selected. In Logical Block mode, the Logical Block Address is interpreted as follows:
LBA7-LBA0: Sector Number register D7-D0.
LBA15-LBA8: Cylinder Low register D7-D0.
LBA23-LBA16: Cylinder High register D7-D0.
LBA27-LBA24: Drive/Head register bits HS3-HS0.
DRV is the drive number. When DRV=0 (Master), Master is selected.
When DRV=1 (Slave), Slave is selected.
When operating in the Cylinder, Head, Sector mode, this is bit 3 of the head number.
It is Bit 27 in the Logical Block Address mode.
When operating in the Cylinder, Head, Sector mode, this is bit 2 of the head number.
It is Bit 26 in the Logical Block Address mode.
When operating in the Cylinder, Head, Sector mode, this is bit 1 of the head number.
It is Bit 25 in the Logical Block Address mode.
When operating in the Cylinder, Head, Sector mode, this is bit 0 of the head number.
It is Bit 24 in the Logical Block Address mode.
LBA
D6
D6
DWF
D5
D5
1
DRV
DSC
D4
D4
17
DRQ
HS3
D3
D3
CORR
HS2
D2
D2
HS1
D1
D1
0
ERR
HS0
D0
D0
S71355-05-000
Reset Value
Reset Value
1010 0000b
1000 0000b
Data Sheet
05/10