ZL50418 Datasheet, PDF (44/163 Pages) Zarlink Semiconductor Inc – Managed 16-Port 10/100 M + 2-Port 1 G Ethernet Switch

ZL50418
Data Sheet
11.0 GPSI (7WS) Interface
11.1 GPSI connection
The 10/100 RMII ethernet port can function in GPSI (7WS) mode when the corresponding TXEN pin is strapped low
with a 1 K pull down resistor. In this mode, the TXD[0], TXD[1], RXD[0] and RXD[1] serve as TX data, TX clock, RX
data and RX clock respectively. The link status and collision from the PHY are multiplexed and shifted into the
switch device through external glue logic. The duplex of the port can be controlled by programming the ECR
register. The GPSI interface can be operated in port based VLAN mode only.
CRS_DV
RXD[0]
RXD[1]
TXD[1]
TXD[0]
TXEN
5041X
crs
rxd
rx_clk
tx_clk
txd
txen
Port 0
Ethernet
PHY
link0
col0
link1
col1
link2
col2
Port 15
Ethernet
PHY
link15
col15
Link
Serializer
(CPLD)
Collision
Serializer
(CPLD)
Figure 15 - GPSI (7WS) Mode Connection Diagram
44
Zarlink Semiconductor Inc.