參數(shù)資料
型號: 37C669
廠商: SMSC Corporation
英文描述: DIODE SCHOTTKY SINGLE 25V 200mW 0.5V-vf 200mA-IFM 30mA-IF 2uA-IR SOD-323 3K/REEL
中文描述: 電腦98/99順從超級I / O軟盤控制器與紅外線支持
文件頁數(shù): 35/164頁
文件大?。?/td> 621K
代理商: 37C669
13
DESCRIPTION OF PIN FUNCTIONS
QFP/
TQFP
PIN NO.
NAME
SYMBOL
BUFFER
TYPE
DESCRIPTION
63-66
68-71
Port Data
PD0-PD7
I/O24
The bi-directional parallel data bus is used
to transfer information between CPU and
peripherals.
100
IOCHRDY
OD24P
In EPP mode, this pin is pulled low to
extend the read/write command. This pin
has an internal pull-up.
IDE/ALT IR PINS
24
nIDE Enable
Interrupt
Request H
nIDEEN
IRQ_H
O24P
(Note 1)
024
OD24
This active low signal is active when the IDE
is enabled and the I/O address is accessing
an IDE register.
The interrupt request from a logical device
or IRQIN may be output on the IRQH signal.
Refer to the configuration registers for more
information.
If EPP or ECP Mode is enabled, this output
is pulsed low, then released to allow sharing
of interrupts.
25
nIDE Chip
Select 0
IRRX2
nHDCS0
IRRX2
O24P
(Note 1)
I
This
is
the
Hard
Disk
Chip
select
corresponding to the eight control block
addresses.
Alternate IR Receive input
26
nIDE Chip
Select 1
IR Transmit 2
nHDCS1
IRTX2
O24P
(Note 1)
O24P
This
is
the
Hard
Disk
Chip
select
corresponding
to
the
alternate
status
register.
Alternate IR transmit output
MISCELLANEOUS
20
CLOCK 14
CLK14
ICLK
The external connection to a single source
14.318 MHz clock.
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