W83627UHG Nuvoton Technology Corporation of America, W83627UHG Datasheet - Page 101

• Manufacturer Part Number: W83627UHG
• Description: IC I/O CONTROLLER 128-QFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627UHG

• Applications: PC's, PDA's
• Interface: LPC
• Voltage - Supply: 3.3V, 5V
• Package / Case: 128-XFQFN
• Mounting Type: Surface Mount
• Pin Count: 128
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9.2.3
The W83627UHG FDC is capable of performing twenty commands. Each command is initiated by a
multi-byte transfer from the microprocessor, and the result may be a multi-byte transfer back to the
microprocessor. Each command consists of three phases: command, execution, and result.
Command
The microprocessor issues all required information to the controller to perform a specific operation.
Execution
The controller performs the specified operation.
Result
After the operation is completed, status information and other housekeeping information are provided
to the microprocessor.
The next section introduces each of the commands.
9.2.4
Command Symbol Descriptions:
C:
D:
DIR:
DS0:
DS1:
DTL:
EC:
EFIFO:
EIS:
EOT:
FIFOTHR:
GAP:
GPL:
H:
HDS:
HLT:
HUT:
LOCK:
MFM:
MT:
N:
NCN:
FDC Core
FDC Commands
Cylinder Number 0 - 256
Data Pattern
Step Direction
DIR = 0: step out
DIR = 1: step in
Disk Drive Select 0
Disk Drive Select 1
Data Length
Enable Count
Enable FIFO
Enable Implied Seek
End of Track
FIFO Threshold
Gap Length Selection
Gap Length
Head Number
Head Number Select
Head Load Time
Head Unload Time
Lock EFIFO, FIFOTHR, and PTRTRK bits to prevent being affected by software reset
MFM or FM Mode
Multitrack
The number of data bytes written in a sector
New Cylinder Number
-90-
W83627UHG