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PC87334VLJ Datasheet(PDF) 77 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # PC87334VLJ
Description  SuperI/O 3.3V/5V Floppy Disk Controller, Dual UARTs, Infrared, IEEE1284 Parallel Port, and IDE Interface
PDF  102 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC87334VLJ Datasheet(HTML) 77 Page - National Semiconductor (TI)

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70 Parallel Port (Continued)
3 Multiplexing parallel port signals with FDC signals on the
PPM pins
When the PPM is not enabled (bit 2 of FCR is 0) the
parallel port signals are connected to the PPM pins
When bit 2 of FCR is 1 and PNF e 1 the parallel port
signals are connected to the PPM pins
When bit 2 of FCR is 1 and PNF e 0 the FDC output
signals are connected to the PPM pins
Reading back the DTR or CTR returns their written val-
ues and thus the parallel port module sees ‘‘cable not
connected’’
Input signals assume their default values (STR register)
BUSY e 1 PE e 0 SLCT e 0 ACK e 1
Table 7-6 shows the standard 25-pin D-type connector defi-
nition for various parallel port operations
TABLE 7-6 Parallel Port Pin Out
Connector
PQFP
TQFP
SPP ECP
Pin
EPP Mode
Pin
PPM Mode
Pin
Pin No
Pin No
Pin No
Mode
Direction
Direction
and PNFe0
Direction
1
95
93
STB
IO
WRITE
IO
I
2
94
92
PD0
IO
PD0
IO
INDEX
I
3
93
91
PD1
IO
PD1
IO
TRK0
I
4
92
90
PD2
IO
PD2
IO
WP
I
5
91
89
PD3
IO
PD3
IO
RDATA
I
6
89
87
PD4
IO
PD4
IO
DSKCHG
I
7
88
86
PD5
IO
PD5
IO
MSEN0
I
8
87
85
PD6
IO
PD6
IO
DRATE0
O
9
86
84
PD7
IO
PD7
IO
MSEN1
I
10
85
83
ACK
I
ACK
I
DR1
O
11
84
82
BUSY
I
WAIT
I
MTR1
O
12
83
81
PE
I
PE
I
WDATA
O
13
82
80
SLCT
I
SLCT
I
WGATE
O
14
78
76
AFD
IO
DSTRB
IO
DENSEL
O
15
79
77
ERR
I
ERR
I
HDSEL
O
16
80
78
INIT
IO
INIT
IO
DIR
O
17
81
79
SLIN
IO
ASTRB
IO
STEP
O
77



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