IBM3229P2035
IBM Packet Routing Switch Serial Interface Converter
Advance
Figure 6: Ingress Timing for RXENB Deasserted by Converter 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]
RXSOP
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
RXPAV
RXENB
3 wait states
Converter cannot accept
a new packet
Converter can again
accept a new packet
Figure 7: Ingress Timing for RXPAV Deasserted by Protocol Engine for 1 Clock Cycle
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]
RXSOP
NOP NOP NOP H1 H2 W1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 NOP H1 H2 W1 W2 W3
RXPAV
RXENB
Converter cannot accept
Protocol engine
ready to send a
new packet
a new packet
Protocol engine
not ready to send
a new packet
1 wait state
Functional Description
Page 22 of 154
prssi.02.fm
March 1, 2001
IBM [ IBM ]
