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參數(shù)資料
| 型號(hào)： | PC87413 |
| 廠(chǎng)商： | National Semiconductor Corporation |
| 英文描述： | LPC ServerI/O for Servers and Workstations |
| 中文描述： | LPC ServerI /服務(wù)器和工作站 |
| 文件頁(yè)數(shù)： | 25/257頁(yè) |
| 文件大小： | 3163K |
| 代理商： | PC87413 |
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1.0 Signal/Pin Connection and Description
(Continued)
Revision 1.2
25
www.national.com
P
1.4.5
Parallel Port
Signal
Pin/s
I/O
Buffer Type Power Well
Description
ACK
78
I
IN
T
V
DD
Acknowledge.
Pulsed low by the printer to indicate that it has
received data from the parallel port.
AFD_DSTRB 90
O
OD
14
, O
14/14
V
DD
AFD - Automatic Feed.
When low, instructs the printer to
automatically feed a line after printing each line. This pin is in
TRI-STATE after a 0 is loaded into the corresponding control
register bit. An external 4.7 K
pull-up resistor must be
connected to this pin.
DSTRB - Data Strobe (EPP).
Active low, used in EPP mode
to denote a data cycle. When the cycle is aborted, DSTRB
becomes inactive (high).
BUSY_WAIT 77
I
IN
T
V
DD
Busy.
Set high by the printer when it cannot accept another
character.
Wait.
In EPP mode, the parallel port device uses this active
low signal to extend its access cycle.
ERR
88
I
IN
T
V
DD
Error.
Set active low by the printer when it detects an error.
INIT
86
O
OD
14
, O
14/14
V
DD
Initialize.
When low, initializes the printer. This signal is in
TRI-STATE after a 1 is loaded into the corresponding control
register bit. An external 4.7 K
pull-up resistor must be
connected to this pin.
PD7-3
PD2
PD1
PD0
79-83
85
87
89
I/O
IN
T
/O
14/14
V
DD
Parallel Port Data.
Transfers data to and from the peripheral
data bus and the appropriate parallel port data register. These
signals have a high current drive capability.
PE
76
I
IN
T
V
DD
Paper End.
Set high by the printer when it is out of paper. This
pin has an internal weak pull-up or pull-down resistor.
SLCT
75
I
IN
T
V
DD
Select.
Set active high by the printer when the printer is
selected.
SLIN_ASTRB 84
O
OD
14
, O
14/14
V
DD
SLIN - Select Input.
When low, selects the printer. This signal
is in TRI-STATE after a 0 is loaded into the corresponding
control register bit. An external 4.7 K
pull-up resistor must be
connected to this pin.
ASTRB - Address Strobe (EPP).
Active low, used in EPP
mode to denote an address or data cycle. When the cycle is
aborted, ASTRB becomes inactive (high).
STB_WRITE 91
O
OD
14
, O
14/14
V
DD
STB - Data Strobe.
When low, Indicates to the printer that
valid data is available at the printer port. This signal is in
TRI-STATE after a 0 is loaded into the corresponding control
register bit. An external 4.7 K
pull-up resistor must be
connected to this pin.
WRITE - Write Strobe.
Active low, used in EPP mode to
denote an address or data cycle. When the cycle is aborted,
WRITE becomes inactive (high).
PPDIS
121
I
IN
T
V
DD
Parallel Port Disable.
When high, this input disables (TRI-
STATEs) all the output signals of the parallel port.
1
1. If this feature is not used, either select the alternate function (P12 port) at the pin multiplexer (see Section 3.7.3
on page 50) or connect an external 3.3 K
pull-down resistor to this pin. If the function connected to the
pin is PPDIS and the pin is left unconnected, the output signals of the parallel port will float.
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PDF描述 |
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| PC87414 | LPC ServerI/O for Servers and Workstations |
| PC87416 | LPC ServerI/O for Servers and Workstations |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PC87414 | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:LPC ServerI/O for Servers and Workstations |
| PC87415 | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:PCI-IDE DMA Master Mode Interface Controller |
| PC87415VCG | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| PC87416 | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:LPC ServerI/O for Servers and Workstations |
| PC87417 | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:LPC ServerI/O for Servers and Workstations |
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