W83977G Winbond Electronics Corp America, W83977G Datasheet - Page 90

• Manufacturer Part Number: W83977G
• Description: W83877TF plus KBC, CIR, RTC, Pb-free
• Manufacturer: Winbond Electronics Corp America

TABLE 8-1-2 PARALLEL PORT CONNECTOR AND PIN DEFINITIONS
8.2
TABLE 8-2 PRINTER MODE AND EPP REGISTER ADDRESS
Notes:
1. These registers are available in all modes.
2. These registers are available only in EPP mode.
8.2.1
The system microprocessor can read the contents of the printer's data latch by reading the data
swapper.
CONNECTOR
W83977F-A/ W83977G-A/ W83977AF-A/ W83977AG-A
A2
HOST
0
0
0
0
0
1
1
1
1
Enhanced Parallel Port (EPP)
10
11
12
13
14
15
16
17
1
2
3
4
5
6
7
8
9
Data Swapper
A1
PIN NUMBER
OF W83977F/
0
0
1
1
1
0
0
1
1
AF
36
31
30
29
28
27
26
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
I/O
I/O
I/O
I/O
I/O
I/O
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)
BUSY
nSLIN
nACK
SLCT
nERR
nSTB
nAFD
nINIT
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
SPP
PE
-82
ATTRIBUTE
REGISTER
PIN
OD
OD
OD
OD
OD
OD
OD
OD
OD
OD
---
---
I
I
I
I
I
RDATA2
DSKCHG2
TRAK02
EXT2FD
INDEX2
HEAD2
STEP2
MOA2
RWC2
MOB2
DSA2
DSB2
DIR2
WP2
WD2
WE2
---
---
D
ATTRIBUTE
PIN
OD
OD
OD
OD
OD
OD
OD
OD
---
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---
---
I
I
I
I
I
DSKCHG2
NOTE
RDATA2
EXTFDD
TRAK02
INDEX2
HEAD2
STEP2
RWC2
MOB2
DSB2
DIR2
WP2
WD2
WE2
1
1
1
1
2
2
2
2
2
---
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