W83877TF Datasheet, PDF (53/154 Pages) Winbond – I/O chip disk drive adapter

W83877TF
4.0 PARALLEL PORT
4.1 Printer Interface Logic
The parallel port of the W83877TF makes possible the attachment of various devices that accept
eight bits of parallel data at standard TTL level. The W83877TF 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), and 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 4-1 shows the pin definitions for different modes of the parallel port.
TABLE 4-1-A Parallel Port Connector and Pin Definition for SPP/EPP/ECP Modes
HOST
CONNECTOR
1
PIN NUMBER
OF W83877TF
19
PIN
ATTRIBUTE
O
2-9
9-14,16-17
I/O
10
26
I
11
24
I
12
27
I
13
28
I
14
20
O
15
29
I
16
21
O
17
22
O
Notes:
n<name > : Active Low
1. Compatible Mode
2. High Speed Mode
3. For more information, refer to the IEEE 1284 standard.
SPP
nSTB
PD<0:7>
nACK
BUSY
PE
SLCT
nAFD
nERR
nINIT
nSLIN
EPP
ECP
nWrite
PD<0:7>
Intr
nWait
PE
Select
nDStrb
nError
nInit
nAStrb
nSTB, HostClk
PD<0:7>
nACK, PeriphClk
BUSY, PeriphAck²
PEerror, nAckReverse²
SLCT, Xflag
nAFD, HostAck²
nFault¹, nPeriphRequest²
nINIT¹, nReverseRqst²
nSLIN¹ , ECPMode²
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Publication Release Date: March 1998
Version 0.61