Product specifications

Design Guide - VT82C694X Apollo Pro133 with VT82C686A
Preliminary Revision 0.5, November 19, 1999 Signal Connectivity and Design Checklist
85
Technologies, Inc.
We ConnectWe Connect
PARALLEL PORT INTERFACE
Signal Name I/O Connection
PD[7:0] IO Connect to the printer connector. 4.7K ohm pull-up to VCC and a 180pF decoupling
capacitor to ground. These passive components should be placed near the connector.
AUTOFD# IO Same as the above.
PINIT# IO Same as the above.
SLCTIN# IO Same as the above.
STROBE# IO Same as the above.
ACK# I Same as the above.
BUSY I Same as the above.
ERROR# I Same as the above.
PE I Same as the above.
SLCT I Same as the above.
FLOPPY DISK INTERFACE
Signal Name I/O Connection
DRVEN0 OD Connect to primary floppy drive connector.
DRVEN1 OD Connect to secondary floppy drive connector if it is installed. Otherwise, no connect.
DIR# OD Connect to the floppy drive connector.
DS0# OD Same as the above.
DS1# OD Same as the above.
HDSEL# OD Same as the above.
MTR0# OD Same as the above.
MTR1# OD Same as the above.
STEP# OD Same as the above.
WDATA OD Same as the above.
WGATE# OD Same as the above.
DSKCHG# I Connect to the floppy drive connector. 1K ohm pull-up to VCC.
INDEX# I Same as the above.
RDATA# I Same as the above.
TRK00# I Same as the above.
WRTPRT# I Same as the above.