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W83627DHG
Publication Release Date: Aug, 22, 2007
-9- Version
1.4
5.1 LPC
Interface
SYMBOL PIN
I/O
DESCRIPTION
IOCLK 18 IN
tp3
System clock input, either 24MHz or 48MHz. The actual frequency
must be specified in the register. The default value is 48MHz.
PME#
86
OD
12p3
Generated PME event.
PCICLK 21 IN
tsp3
PCI-clock 33-MHz input.
LDRQ# 22 O
12p3
Encoded DMA Request signal.
SERIRQ 23
I/OD
12tp3
Serialized IRQ input / output.
LAD[3:0] 24-27 I/O
12tp3
These signal lines communicate address, control, and data
information over the LPC bus between a host and a peripheral.
LFRAME#
29
IN
tsp3
Indicates the start of a new cycle or the termination of a broken
cycle.
LRESET#
30
IN
tsp3
Reset signal. It can be connected to the PCIRST# signal on the
host.
5.2 FDC
Interface
SYMBOL PIN I/O
DESCRIPTION
DRVDEN0 1 OD
24
Drive Density Select bit 0.
INDEX#
3 IN
cs
This Schmitt-trigger 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 needs to connect a pulled-up 1-K
Ω
resistor to 5V for
Floppy Drive compatibility.
MOA#
4 OD
24
Motor A On. When set to 0, this pin activates disk drive A. This is an
open-drain output.
DSA#
6 OD
24
Drive Select A. When set to 0, this pin activates disk drive A. This is an
open-drain output.
DIR# 8
OD
24
Direction of the head step motor. An open-drain output.
Logic 1 = outward motion
Logic 0 = inward motion
STEP#
9 OD
24
Step output pulses. This active-low open-drain output produces a
pulse to move the head to another track.
WD#
10 OD
24
Write data. This logic-low open-drain writes pre-compensation serial
data to the selected FDD. An open-drain output.
WE#
11 OD
24
Write enable. An open-drain output.
TRAK0#
13 IN
cs
Track 0. This Schmitt-trigger input from the disk drive is active-low
when the head is positioned over the outermost track. This input pin
needs to connect a pulled-up 1-K
Ω
resistor to 5V for Floppy Drive
compatibility.
Содержание W83627DHG
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