W83627EHG Nuvoton Technology Corporation of America, W83627EHG Datasheet - Page 23

• Manufacturer Part Number: W83627EHG
• Description: IC I/O CONTROLLER 128-QFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627EHG

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

5.2
DRVDEN0
SYMBOL
LFRAME#
INDEX#
LRESET#
SYMBOL
STEP#
LAD[3:0]
SERIRQ
MOA#
PCICLK
DSA#
LDRQ#
DIR#
FDC Interface
PIN
1
3
4
6
8
9
24-27
PIN
21
22
23
29
30
OD
OD
OD
OD
OD
IN
I/O
csu
24
24
24
24
24
OUT
I/O
I/O
Drive Density Select bit 0.
This Schmitt-triggered input from the disk drive is active low when the head
is positioned over the beginning of a track marked by an index hole. This
input pin can be pulled up internally by a 1 KΩ(±50%). The resistor also
can be disabled/enabled by bit 7 of LD0-CRF0(FIPURDWN). Default is
disabled.
Motor A On. When set to 0, this pin enables disk drive 0. This is an open
drain output.
Drive Select A. When set to 0, this pin enables disk drive A. This is an open
drain output.
Direction of the head step motor. An open drain output.
Logic 1 = outward motion
Logic 0 = inward motion
Step output pulses. This active low open drain output produces a pulse to
move the head to another track.
I/O
IN
IN
IN
12t
12t
t
t
t
12
PCI clock 33 MHz input.
Encoded DMA Request signal.
Serial IRQ Input/Output.
These signal lines communicate address, control, and data
information over the LPC bus between a host and a peripheral.
Indicates start of a new cycle or termination of a broken cycle.
Reset signal. It can connect to PCIRST# signal on the host.
W83627EHF/EF, W83627EHG/EG
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FUNCTION
FUNCTION