DTRQ
DTAK
IUSTB
H/L
Subsystem Reply Time < 13.5µs
Don’t Care
250 nsec
250 nsec
500 nsec
CWC0-CWC4
Valid
Incremented
Enable High Byte of TX
Data on Internal
Highway
Enable Low Byte of
TX Data on Internal
Highway
Figure 11 – Handshaking for Tx Data Transfers
DTRQ
DTAK
IUSTB
H/L
Subsystem Reply Time < 1.5µs
Don’t Care
250 nsec
250 nsec
500 nsec
Internal
Highway
High Byte Valid
Low Byte Valid
CWC0-CWC4
Valid
Incremented
Aeroflex Circuit Technology
Figure 12 – Handshaking for Rx Data Transfers
16
SCDCT1995 REV A 11/21/01 Plainview NY (516) 694-6700