W83977F-A Datasheet, PDF (90/182 Pages) Winbond – WINBOND I/O

W83977F-A/ W83977G-A/ W83977AF-A/ W83977AG-A
TABLE 8-1-2 PARALLEL PORT CONNECTOR AND PIN DEFINITIONS
HOST
CONNECTOR
1
2
3
4
5
6
PIN NUMBER
OF W83977F/
AF
36
31
30
29
28
27
PIN
ATTRIBUTE
O
I/O
I/O
I/O
I/O
I/O
SPP
nSTB
PD0
PD1
PD2
PD3
PD4
PIN
EXT2FD
PIN
ATTRIBUTE
D
ATTRIBUTE
---
---
---
I
INDEX 2
I
I
TRAK02
I
I
WP2
I
I
RDATA 2
I
I
DSKCHG2
I
EXTFDD
---
INDEX 2
TRAK02
WP2
RDATA 2
DSKCHG2
7
26
I/O
PD5
---
---
---
---
8
24
I/O
PD6
OD
MOA 2
---
---
9
23
I/O
PD7
OD
DSA 2
---
---
10
22
I
nACK
OD
DSB2
OD
DSB2
11
21
I
BUSY
OD
MOB2
OD
MOB2
12
19
I
PE
OD
WD2
OD
WD2
13
18
I
SLCT
OD
WE2
OD
WE2
14
35
O
nAFD
OD
RWC2
OD
RWC2
15
34
I
nERR
OD
HEAD2
OD
HEAD2
16
33
O
nINIT
OD
DIR2
OD
DIR2
17
32
O
nSLIN
OD
STEP2
OD
STEP2
8.2 Enhanced Parallel Port (EPP)
TABLE 8-2 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
8.2.1 Data Swapper
The system microprocessor can read the contents of the printer's data latch by reading the data
swapper.
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