W83977EF Winbond Electronics Corp America, W83977EF Datasheet - Page 61

• Manufacturer Part Number: W83977EF
• Description: Description = W83877TF Plus Kbc, GP I/O, Wake-Up, Power Fail Resume ;; Package = QFP 128
• Manufacturer: Winbond Electronics Corp America

5.0 PARALLEL PORT
5.1 Printer Interface Logic
The parallel port of the W83977EF makes possible the attachment of various devices that accept eight
bits of parallel data at standard TTL level. The W83977EF 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 5-1 shows the pin definitions for different modes of the parallel port.
TABLE 5-1-1 PARALLEL PORT CONNECTOR AND PIN DEFINITIONS
Notes:
n<name > : Active Low
1. Compatible Mode
2. High Speed Mode
3. For more information, refer to the IEEE 1284 standard.
CONNECTOR
HOST
2-9
10
11
12
13
14
15
16
17
1
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
-55 -
PD<0:7>
BUSY
nSLIN
nACK
nERR
nSTB
SLCT
nAFD
nINIT
SPP
PE
PD<0:7>
nDStrb
nAStrb
nWrite
Select
nError
nWait
EPP
nInit
Intr
PE
Publication Release Date: April 2003
nSTB, HostClk
PD<0:7>
nACK, PeriphClk
BUSY, PeriphAck
PEerror, nAckReverse
SLCT, Xflag
nAFD, HostAck
nFault
nINIT
nSLIN
1
1
1
, nReverseRqst
, nPeriphRequest
, ECPMode
W83977EF
2
ECP
2
2
2
2
2
Revision 1.1
2
2
2