ST78C34 Exar Corporation, ST78C34 Datasheet - Page 10
ST78C34
Manufacturer Part Number
ST78C34
Description
General Purpose Parallel Printer Port With 83 Byte Fifo
Manufacturer
Exar Corporation
Datasheet
1.ST78C34.pdf
(21 pages)
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ST78C34 REGISTER CONFIGURATIONS
ST78C34
Rev. 3.00
A1 A0 REGISTER
0 0
0 1
1 0
1 0
1 1
1 1
FBCR
COM
CON
STR
AFR
PR
BUSY/
enable
-FIFO
-FIFO
status
FIFO
PD7
D7
full
1
X
Latched
polarity
FBC-6
None
PD6
INT
INT
D6
X
1
FBC-5
select
bit-1
PD5
type
INT
D5
I/O
PE
1
6-12
enable
FBC-4
SLCT
mask
bit-0
PD4
type
INT
INT
INT
D4
-SLCTIN
-SLCTIN
ERROR
source
FBC-3
PD3
INT
D3
Latched
TIMING
FBC-2
select
PD2
bit-2
INIT
INIT
INT
D2
-AUTO- -STROBE
TIMING
-AUTO- -STROBE
FBC-1
FDXT
FDXT
select
PD1
bit-1
D1
1
TIMING
FBC-0
select
PD0
bit-0
D0
1