W83977AF Information Storage Devices, Inc, W83977AF Datasheet - Page 91

• Manufacturer Part Number: W83977AF
• Description: W83877TF Plus Kbc, Cir, RTC
• Manufacturer: Information Storage Devices, Inc

TABLE 5-1-2, continued
5.2
TABLE 5-2 PRINTER MODE AND EPP REGISTER ADDRESS
Notes:
1. These registers are available in all modes.
2. These registers are available only in EPP mode.
5.2.1 Data Swapper
The system microprocessor can read the contents of the printer's data latch by reading the data
swapper.
CONNECTOR
HOST
A2
0
0
0
0
0
1
1
1
1
10
11
12
13
14
15
16
17
Enhanced Parallel Port (EPP)
8
9
PIN NUMBER OF
W83977F/ AF
A1
0
0
1
1
1
0
0
1
1
24
23
22
21
19
18
35
34
33
32
A0
0
1
0
0
1
0
1
0
1
ATTRIBUTE
PIN
I/O
I/O
O
O
O
I
I
I
I
I
Data port (R/W)
Printer status buffer (Read)
Printer control latch (Write)
Printer control swapper (Read)
EPP address port (R/W)
EPP data port 0 (R/W)
EPP data port 1 (R/W)
EPP data port 2 (R/W)
EPP data port 2 (R/W)
nSLIN
BUSY
nERR
nACK
SLCT
nAFD
nINIT
SPP
PD6
PD7
- 79 -
PE
ATTRIBUTE
REGISTER
PIN
OD
OD
OD
OD
OD
OD
OD
OD
OD
OD
W83977F/ W83977AF
Publication Release Date:March 1998
EXT2FDD
HEAD2
STEP2
MOA2
RWC2
MOB2
DSA2
DSB2
DIR2
WD2
WE2
ATTRIBUTE
PRELIMINARY
PIN
OD
OD
OD
OD
OD
OD
OD
OD
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Revision 0.58
NOTE
EXTFDD
HEAD2
STEP2
RWC2
MOB2
DSB2
DIR2
WD2
WE2
1
1
1
1
2
2
2
2
2
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