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3-22 M3099GX/GH OEM Manual
If the I/O signal is true (transfer to the initiator), the target shall first
drive the DB(7-0,P) signals to their desired values, wait at least one
deskew delay plus one cable skew delay, then assert the REQ signals.
The DB(7-0,P) signals shall be held valid for a minimum of one
deskew delay plus one cable skew delay plus one hold time after the
assertion of the REQ signal. The target shall assert the REQ signal
for a minimum of an assertion period. The target may then negate
the REQ signals within one hold time of the transition of the REQ
signal to true. The initiator shall then respond with an ACK pulse.
If the I/O signal is false (transfer to the target), the initiator shall
tranfer one byte for each REQ pulse received. After receiving the
leading edge of a REQ pulse, the initiator shall first drive the DB(7-
0,P) signals to their desired values, delay at least one deskew delay
plus one cable skew delay, then assert the ACK signal. The initiator
shall hold the DB(7-0,P) signals valid for at least one deskew delay
plus one cable skew delay plus one hold time after the assertion of
the ACK signal. The initiator shall assert the ACK signal for a
minimum of an assertion period. The initiator may then negate the
ACK signal and may one hold time of the transition of the ACK
signal to true.
COMMAND Phase
The COMMAND phase allows the target to request command
information from the initiator.
The target shall assert the C/D signal and negate the I/O and MSG
signals during the REQ/ACK handshake(s) of this phase.
Data Phase
The data phase is a term that encompasses both the DATA IN phase
and the DATA OUT phase.
#03.pm5 98.2.22, 1:31 PM22