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
SC220
XpressFlow Engine
1.1
1.2
1.3 Connection Diagram – 256-PQFP Package (Top View)
256
193
1
L_A[13]
192
P_INT
L_A[14]
L_A[15]
VSS
L_A[16]
L_A[17]
VDD
P_RWC
P_RSTOUT
P_RSTIN#
VSS
P_CLK
VDD
CAM Interface
Pin 1 I.D.
L_A[18]
L_A[19] / L_OE[3]#
L_WE[1]#
L_OE[1]#
L_BWE[3]#
L_BWE[2]#
L_BWE[1]#
L_BWE[0]#
L_ADSC#
VSS
P_D[31]
P_D[30]
P_D[29]
P_D[28]
VSS
P_D[27]
P_D[26]
VDD
P_D[24]
P_D[25]
P_D[23]
P_D[22]
VSS
L_WE[0]#
L_OE[0]#
VDD
L_D[0]
L_D[1]
L_D[2]
P_D[21]
P_D[20]
VDD
L_D[3]
L_D[4]
L_D[5]
L_D[6]
P_D[19]
P_D[18]
P_D[17]
P_D[16]
VSS
VSS
L_D[7]
L_D[8]
VDD
P_D[15]
P_D[14]
VDD
VDD (Core)
VDD (Core)
P_D[13]
P_D[12]
VSS (Core)
P_D[11]
P_D[10]
VSS
P_D[9]
P_D[8]
VDD
L_D[9]
L_D[10]
VSS (Core)
L_D[11]
L_D[12]
L_D[13]
L_D[14]
L_D[15]
VSS
L_D[16]
L_D[17]
VDD
P_D[7]
P_D[6]
P_D[5]
L_D[18]
L_D[19]
L_D[20]
L_D[21]
L_D[22]
L_D[23]
L_D[24]
VSS
L_D[25]
L_D[26]
VDD
L_D[27]
L_D[28]
L_D[29]
L_D[30]
L_D[31]
VSS
P_D[4]
VSS
P_D[3]
P_D[2]
VDD
P_D[1]
P_D[0]
S_GNT[8]#
S_REQ[8]#
S_GNT[7]#
S_REQ[7]#
S_GNT[6]#
VSS
S_REQ[6]#
S_GNT[5]#
S_REQ[5]#
S_GNT[4]#
S_REQ[4]#
S_GNT[3]#
S_REQ[3]#
L_WE[2]#
L_OE[2]#
Test
XpressFlow Bus Interface
64
129
128
65
© 1998 Vertex Networks, Inc.
7
Rev. 4.5 – February
1999
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
