NEC UPD98413 User Manual page 125

RXCLK
RXADDR[1:0]
PORT0 PORT1 PORT2
RXCLAV0
PORT0
RXENB_B
RXDATA[31:0]
P3 P4 P5
RXPRTY
RXSOC
X : Invalid
Back-to-back reception of cells is possible when two or more cells have to be received from the same port and
the ATM device can receive the second cell. In the case of back-to-back transfer the ATM device does not
explicitly select the µPD98413 port as transfer to the same port is assumed. The second cell is transferred
immediately after the previous one and the RXSOC is asserted to indicate the start of cell. This example is
illustrated below.
Figure 4-12. Back-to-back Cell Reception (Status Polling)
RXCLK
RXADDR[1:0]
PORT3 PORT0 PORT1
RXCLAV0
PORT3
RXENB_B
RXDATA[31:0]
P10 P11 P12
RXPRTY
RXSOC
X : Invalid
CHAPTER 4 INTERFACES
Figure 4-11. Receive Timing (Status Polling)
PORT3
PORT1 PORT2 PORT3
P6 P7 P8 P9 P10
PORT2 PORT3 PORT0
PORT0 PORT1
X H1 P8 P9
X
PRELIMINARY
PORT1
PORT1
P11 P12 X H1 P1
X
PORT0
P10 P11 P12 H1 P1
NEC confidential and Proprietary
P2 P3 P4
P2 P3 P4
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