IBM3229P2035
Advance
IBM Packet Routing Switch Serial Interface Converter
Figure 8: Ingress Timing for RXPAV Deasserted by Protocol Engine for 3 Clock Cycles
Ingress Operation for 64-Byte Packet Flow Control
T0
T2
T4
T6
T8
T10
T12
T14
T16
T18
T20
T22
T24
PE_RXCLK_OUT
RXDATA[31:0] NOP NOP NOP H1 H2 W1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 NOP NOP NOP H1 H2 W1
RXSOP
RXPAV
RXENB
Converter cannot accept
a new packet
Protocol engine ready
to send a new packet
Protocol engine
not ready to send
a new packet
3 wait states
Figure 9: Ingress Packets in Back-to-Back from Protocol Engine
Receive Operation for 64-Byte Back-to-Back Packets
T0
T2
T4
T6
T8
T10
T12
T14
T16
T18
T20
T22
T24
PE_RXCLK_OUT
RXDATA[31:0] NOP NOP NOP H1 H2 W1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 H1 H2 W1 W2 W3 W4
RXSOP
High
RXPAV
RXENB
Converter ready to receive
a new packet
Protocol engine ready
to send a new packet
prssi.02.fm
Functional Description
Page 23 of 154
March 1, 2001
IBM [ IBM ]
