w83977eg Winbond Electronics Corp America, w83977eg Datasheet - Page 55

• Manufacturer Part Number: w83977eg
• Description: Winbond Isa I/o W83977ef W83977eg
• Manufacturer: Winbond Electronics Corp America

7. PARALLEL PORT
7.1
The parallel port of W83977EF/EG makes possible the attachment of various devices that accept
eight bits of parallel data at standard TTL level. W83977EF/EG supports an IBM XT/AT compatible
parallel port (SPP), bi-directional parallel port (BPP), Enhanced Parallel Port (EPP), Extended
Capabilities Parallel Port (ECP), Extension FDD mode (EXTFDD), Extension 2FDD mode (EXT2FDD)
on the parallel port. Refer to the configuration registers for more information on disabling, power-
down, and on selecting the mode of operation.
Table 7-1 shows the pin definitions for different modes of the parallel port.
Notes :
n<name > : Active Low
1. Compatible Mode
2. High Speed Mode
3. For more information, refer to the IEEE 1284 standard.
CONNECTOR
HOST
Printer Interface Logic
2-9
10
11
12
13
14
15
16
17
1
TABLE 7-1-1 PARALLEL PORT CONNECTOR AND PIN DEFINITIONS
OF W83977EF
PIN NUMBER
31-26, 24-23
36
22
21
19
18
35
34
33
32
ATTRIBUTE
PIN
I/O
O
O
O
O
I
I
I
I
I
W83977EF-AW/W83977EG-AW
-53-
PD<0:7>
nSLIN
BUSY
nACK
nERR
nSTB
SLCT
nAFD
nINIT
SPP
PE
PD<0:7>
nAStrb
nDStrb
nWrite
nError
Select
nWait
EPP
nInit
Intr
PE
Publication Release Date: Apr. 2006
nSTB, HostClk
PD<0:7>
nACK, PeriphClk
BUSY, PeriphAck
PEerror, nAckReverse
SLCT, Xflag
nAFD, HostAck
nFault
nINIT
nSLIN
1
1
, nReverseRqst
1
, nPeriphRequest
, ECPMode
2
ECP
2
2
2
2
2
Revision 1.2
2
2
2