ST78C36(2004) 查看數據表（PDF） - Exar Corporation
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ST78C36 Datasheet PDF : 26 Pages
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ST78C36/36A
ECP/EPP PARALLEL PRINTER PORT WITH 16-BYTE FIFO
PIN DESCRIPTION
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REV. 5.0.1
NAME
44-PLCC 64-TQFP
TYPE
PIN #
PIN#
DESCRIPTION
PRINTER PORT INTERFACE
PD7
38
45
I/O Bi-directional parallel port (three-state) to transfer data in or out of the
PD6
37
44
PD5
36
43
ST78C36 parallel port. PD[7:0] are latched during output mode. Output
only for SPP and PPF modes, bi-directional for all other modes.
PD4
35
42
PD3
34
41
PD2
33
40
PD1
32
39
PD0
31
38
-STROBE
25
27
O Data strobe output (internal pull-up / three stated active low). This output
indicates to the printer that valid data is available at the printer port (PD0-
PD7).
-AUTOFDX
26
28
O Automatic line feed (internal pull-up / three stated active low). When this
signal is low the printer should automatically line feed after each line is
printed.
INIT
27
29
O Initialize line printer (internal pull-up / three stated active low). When this
signal is low, it causes the printer to be initialized.
-SLCTIN
28
30
O Line printer select (internal pull-up / three stated active low). When this
signal is low, it selects the printer.
-ERROR
1
57
I Line printer error (internal pull-up / active low). This is an output from the
printer to indicate an error by holding it low during error condition.
SLCT
2
58
I Line printer selected (internal pull-up / active high). This is an output from
the printer to indicate that the line printer has been selected.
BUSY
3
59
I Line printer busy (internal pull-up / active high). An output from the printer
to indicate printer is not ready to accept data.
-ACK
4
60
I Line printer acknowledge (internal pull-up / active low). This input is
pulsed low by the printer to indicate that data has been accepted success-
fully.
PE
5
61
I Line printer paper empty (internal pull-up / active high). An output from the
printer to indicate out of paper.
PDIR
21
23
O Printer port direction indicator. HIGH indicates device is in input mode,
LOW indicates output mode. (ST78C36CJ44 and ST78C36CQ64 only).
SYSTEM SIGNALS
CLOCK/
20
21
I Crystal oscillator input (ST78C36ACJ44, ST78C36CQ64) or External
XTAL1
clock input (ST78C36CJ44), nominal 24 MHz.
XTAL2
21
22
O Crystal oscillator output, nominal 24 MHz. ST78C36ACJ44 and
ST78C36CQ64 only.
RESET
24
26
I System RESET ( active HIGH).
4
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