W83977ATF Datasheet, PDF (103/207 Pages) Winbond – WINBOND I/O

W83977ATF
PRELIMINARY
5.0 PARALLEL PORT
5.1 Printer Interface Logic
The parallel port of the W83977ATF makes possible the attachment of various devices that accept
eight bits of parallel data at standard TTL level. The W83977ATF 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 5-1-1 and table 5-1-2 show the pin definitions for different modes of the parallel port.
TABLE 5-1-1 PARALLEL PORT CONNECTOR AND PIN DEFINITIONS
HOST
CONNECTOR
1
PIN NUMBER
OF W83977ATF
36
PIN
ATTRIBUTE
O
SPP
nSTB
2-9
31-26, 24-23
I/O
PD<0:7>
10
22
I
nACK
11
21
I
BUSY
12
19
13
18
I
PE
I
SLCT
14
35
O
nAFD
15
34
I
nERR
16
33
O
nINIT
17
32
O
nSLIN
Notes:
n<name > : Active Low
1. Compatible Mode
2. High Speed Mode
3. For more information, refer to the IEEE 1284 standard.
EPP
ECP
nWrite
PD<0:7>
Intr
nWait
PE
Select
nDStrb
nError
nInit
nAStrb
nSTB, HostClk²
PD<0:7>
nACK, PeriphClk²
BUSY, PeriphAck²
PEerror, nAckReverse²
SLCT, Xflag²
nAFD, HostAck²
nFault¹, nPeriphRequest²
nINIT¹, nReverseRqst²
nSLIN¹ , ECPMode²
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Publication Release Date:April 1998
Revision 0.52