Product specifications

Design Guide - VT82C694X Apollo Pro133 with VT82C686A
Preliminary Revision 0.5, November 19, 1999 Signal Connectivity and Design Checklist
84
Technologies, Inc.
We ConnectWe Connect
ULTRA DMA-66 ENHANCED IDE INTERFACE
Signal Name I/O Connection
PDIOR# O Connected to primary IDE connector through a 33 ohm series resistor.
PDIOW# O Same as the above.
PDDACK# O Same as the above.
PDCS1# O Same as the above.
PDCS3# O Same as the above.
PDA[2:0] O Same as the above.
PDDRQ I Connected to primary IDE connector through a 33 ohm series resistor. 5.6K ohm pull-
down on the connector side of the series resistor.
PDRDY# I Connected to primary IDE connector through a 33 ohm series resistor. 1K ohm pull-up to
VCC on the connector side of the series resistor.
DD[15:0]
/PDD[15:0]
IO Connected to primary IDE connector through 33 ohm series resistors or also connected to
secondary IDE connector through 33 ohm series resistors if SPKR is pulled up to VCC3.
10K ohm pull-down on the VT82C686A side of the series resistor.
SDIOR# O Connected to secondary IDE connector through a 33 ohm series resistor.
SDIOW# O Same as the above.
SDDACK# O Same as the above.
SDCS1# O Same as the above.
SDCS3# O Same as the above.
SDA[2:0] O Same as the above.
SDDRQ I Connected to secondary IDE connector through a 33 ohm series resistor. 5.6K ohm pull-
down on the connector side of the series resistor.
SDRDY# I Connected to secondary IDE connector through a 33 ohm series resistor. 1K ohm pull-up
to VCC on the connector side of the series resistor.
SDD15/MSI
SDD14/MSO
SDD13/JBB1
SDD12/JBB2
SDD11/JAB1
SDD10/JAB2
SDD9/JAX
SDD8/JAY
SDD7/JBX
SDD6/JBY
SDD5/ACRST
SDD4/SDOUT
SDD3/SYNC
SDD2/SDIN2
SDD1/SDIN
SDD0/BITCLK
IO/I
IO/O
IO/I
IO/I
IO/I
IO/I
IO/I
IO/I
IO/I
IO/I
IO/O
IO/O
IO/O
IO/I
IO/I
IO/I
Connected to secondary IDE connector through 33 ohm series resistors when pin SPEAK
is strapped to low. Otherwise, Connected to Audio/Game port instead when pin SPEAK is
strapped to high.