w83877atd Winbond Electronics Corp America, w83877atd Datasheet - Page 86

• Manufacturer Part Number: w83877atd
• Description: Winbond I/o
• Manufacturer: Winbond Electronics Corp America

4.0 PARALLEL PORT
4.1 Printer Interface Logic
The parallel port of the W83877ATF makes possible the attachment of various devices that accept
eight bits of parallel data at standard TTL level. The W83877ATF 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 Connnector and Pin Definition for SPP/EPP/ECP Modes
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 W83877ATF
PIN NUMBER
9-14,16-17
19
26
24
27
28
20
29
21
22
ATTRIBUTE
PIN
I/O
O
O
O
O
I
I
I
I
I
- 82 -
PD<0:7>
BUSY
nERR
nSLIN
nSTB
nACK
SLCT
nAFD
nINIT
SPP
PE
PD<0:7>
nDStrb
nWrite
nAStrb
nWait
Select
nError
EPP
nInit
Intr
PE
Publication Release Date: April 1998
nSTB, HostClk
PD<0:7>
nACK, PeriphClk
BUSY, PeriphAck
PEerror, nAckReverse
SLCT, Xflag
nAFD, HostAck
nFault
nINIT
nSLIN
1
1
1
, nReverseRqst
, nPeriphRequest
, ECPMode
W83877ATF
ECP
2
2
2
Version 0.51
2
2
2