P
R
E
L
I
M
I
N
A
R
Y
I
N
F
O
R
M
A
T
I
O
N
XpressFlow-2020 Series –
Ethernet Switch Chipset
EA218
6+2 Ports 10Mb Ethernet Access Controller
2.2.4 Intel 386 Processor Interface
P_CLK
PH2 (internal)
PH2
P_ADS#
P_A[11:1]
P_CS#
P_W/R#
P_RDY#
P_D[15:0] (in)
P_D15:0] (out)
Typical 386 CPU I/O Access Operations
P_CLK
PH2 (internal)
P_RST#
PH2
PH1
PH2
PH2 or PH1
Internal PH2 Clock Synchronization **
Note: ** See Intel 386 Processor Data Book for more details
© 1998 Zarlink Semiconductor, Inc.
12
Rev. 2.1- February, 1999