參數(shù)資料
型號(hào): FDC37C666GT
廠商: STANDARD MICROSYSTEMS CORP
元件分類: 存儲(chǔ)控制器/管理單元
英文描述: High-Performance Multi-Mode Parallel Port Super I/O Floppy Disk Controllers
中文描述: 1 Mbps, IDE COMPATIBLE, FLOPPY DISK DRIVE CONTROLLER, PQFP100
封裝: QFP-100
文件頁(yè)數(shù): 8/152頁(yè)
文件大?。?/td> 621K
代理商: FDC37C666GT
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8
DESCRIPTION OF PIN FUNCTIONS
BUFFER
TYPE
nDIR
OD48
PIN NO.
7
NAME
SYMBOL
DESCRIPTION
current
nDirection
Control
This
determines the direction of the head
movement. A logic "1" on this pin means
outward motion, while a logic "0" means
inward motion.
This active low high current driver issues a
low pulse for each track-to-track movement
of the head.
This input senses that the drive door is open
or that the diskette has possibly been
changed since the last drive selection. This
input is inverted and read via bit 7 of I/O
address 3F7H.
Active low open drain outputs select drives
0-1. Refer to Note 2.
Active low open drain output selects drives
2. Refer to Note 2.
high
low
active
output
8
nStep Pulse
nSTEP
OD48
17
nDisk Change
nDSKCHG
IS
4,3
nDrive Select
O,1
nDrive Select 2
nDS0,1
OD48
98
nDrive Select 3
PDIR
nDS2
nDS3
PDIR
OD48
OD48
O4
In non-ECP mode: Active low open drain
output selects drive 3. Refer to Note 2.
This bit is used to indicate the direction of
the Parallel Port data bus. 0 = output/write
1 = input/read
In non-ECP mode: Active low open drain
output selects drive 3. Refer to Note 2.
97
nDrive Select 3
I/O Address 10
nDS3
A10
0D48
I
In ECP Mode, this pin is the A10 address
input.
These active low open drain outputs select
motor drives 0-1. Refer to Note 1.
Motor On 2: Refer to Note 1.
2,5
nMotor On 0,1
nMTR0,1
OD48
96
nMotor On 2
nMTR2
nPDACK
OD48
I
In ECP Mode, nMTR2 is the Parallel Port
DMA Acknowledge input. Active Low.
Motor On 3: Refer to Note 1.
99
nMotor On 3
nMTR3
PDRQ
OD48
O24
In ECP Mode, MTR3 is the Parallel Port
DMA Request output. Active High.
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