W83977F Datasheet, PDF (91/181 Pages) Winbond – PLUG & PLAY 1.0A COMPLIANT

TABLE 5-1-2, continued
HOST
PIN NUMBER OF
CONNECTOR
W83977F/ AF
8
24
9
23
10
22
11
21
12
19
13
18
14
35
15
34
16
33
17
32
PIN
ATTRIBUTE
I/O
I/O
I
I
I
I
O
I
O
O
SPP
PD6
PD7
nACK
BUSY
PE
SLCT
nAFD
nERR
nINIT
nSLIN
W83977F/ W83977AF
PRELIMINARY
PIN
ATTRIBUTE
OD
OD
OD
OD
OD
OD
OD
OD
OD
OD
EXT2FDD
MOA 2
DSA 2
DSB2
MOB2
WD2
WE2
RWC2
HEAD2
DIR2
STEP2
PIN
ATTRIBUTE
---
---
OD
OD
OD
OD
OD
OD
OD
OD
EXTFDD
---
---
DSB2
MOB2
WD2
WE2
RWC2
HEAD2
DIR2
STEP2
5.2 Enhanced Parallel Port (EPP)
TABLE 5-2 PRINTER MODE AND EPP REGISTER ADDRESS
A2
A1
A0
REGISTER
0
0
0
Data port (R/W)
0
0
1
Printer status buffer (Read)
0
1
0
Printer control latch (Write)
0
1
0
Printer control swapper (Read)
0
1
1
EPP address port (R/W)
1
0
0
EPP data port 0 (R/W)
1
0
1
EPP data port 1 (R/W)
1
1
0
EPP data port 2 (R/W)
1
1
1
EPP data port 2 (R/W)
Notes:
1. These registers are available in all modes.
2. These registers are available only in EPP mode.
NOTE
1
1
1
1
2
2
2
2
2
5.2.1 Data Swapper
The system microprocessor can read the contents of the printer's data latch by reading the data
swapper.
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Publication Release Date:March 1998
Revision 0.58