參數(shù)資料
型號(hào)： SP37E760
廠商： SMSC Corporation
英文描述： 3.3 V I/O CONTROLLER FOR EMBEDDED APPLICATIONS
中文描述： 3.3第VI / O控制器為嵌入式應(yīng)用
文件頁(yè)數(shù)： 10/78頁(yè)
文件大?。?/td> 510K
代理商： SP37E760
SMSC DS – SP37E760
Page 10
Rev. 04/13/2001
PIN #
TQFP
82,84
QFP
84,86
NAME
SYMBOL
BUFFER
TYPE
DESCRIPTION
nRing
Indicator
nRI1
nRI2
I
(Note
1
)
Active low Ring Indicator inputs for the serial port.
Handshake signal which notifies the UART that the
telephone ring signal is detected by the modem. The
CPU can monitor the status of nRI signal by reading
bit 6 of Modem Status Register (MSR). A nRI signal
state change from low to high after the last MSR read
will set MSR bit 2 to a 1. If bit 3 of Interrupt Enable
Register is set, the interrupt is generated when nRI
changes state. Note: Bit 6 of MSR is the
complement of nRI.
PARALLEL PORT INTERFACE (NOTE 2)
nSLCTIN
nINIT
nAUTOFD
nSTROBE
BUSY
nACK
PE
71
73
nPrinter
Select Input
(Note
2
)
(OD14/OP1
4)/OD12
This active low output selects the printer. This is the
complement of bit 3 of the Printer Control Register.
Refer to Parallel Port description for use of this pin in
ECP and EPP mode.
72
74
nInitiate
Output
(Note
2
)
(OD14/OP1
4)/OD12
This output is bit 2 of the printer control register. This
is used to initiate the printer when low.
Refer to Parallel Port description for use of this pin in
ECP and EPP mode.
This output goes low to cause the printer to
automatically feed one line after each line is printed.
The nAUTOFD output is the complement of bit 1 of
the Printer Control Register.
Refer to Parallel Port description for use of this pin in
ECP and EPP mode.
An active low pulse on this output is used to strobe
the printer data into the printer. The nSTROBE
output is the complement of bit 0 of the Printer Control
Register.
Refer to Parallel Port description for use of this pin in
ECP and EPP mode.
This is a status output from the printer, a high
indicating that the printer is not ready to receive new
data. Bit 7 of the Printer Status Register is the
complement of the BUSY input. Refer to Parallel Port
description for use of this pin in ECP and EPP mode.
74
76
nAutofeed
Output
(Note
2
)
(OD14/OP1
4)/OD12
75
77
nStrobe
Output
(Note
2
)
(OD14/OP1
4)/OD12
59
61
Busy
I/OD12
60
62
nAcknowl-
edge
I/OD12
A low active output from the printer indicating that it
has received the data and is ready to accept new
data. Bit 6 of the Printer Status Register reads the
nACK input. Refer to Parallel Port description for use
of this pin in ECP and EPP mode.
Another status output from the printer, a high
indicating that the printer is out of paper. Bit 5 of the
Printer Status Register reads the PE input. Refer to
Parallel Port description for use of this pin in ECP and
EPP mode.
58
60
Paper End
I/OD12
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SP37E760-MC 制造商:SMSC 制造商全稱(chēng):SMSC 功能描述:3.3 V I/O CONTROLLER FOR EMBEDDED APPLICATIONS
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