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
-40
-50
-66
Symbol
Parameter
Min Max Min Max Min Max
(ns) (ns) (ns) (ns) (ns) (ns)
Note:
S1
S_D[31:0] output valid delay
S_MSGEN# output valid delay
S_EOF# output valid delay
S_IRDY output valid delay
S_TABT# output valid delay
S_HPREQ# output valid delay
S_REQ# output valid delay
S_D[31:0] output float delay
S_MSGEN# output float delay
S_EOF# output float delay
S_IRDY output float delay
S_D[31:0] input set-up time
S_D[31:0] input hold time
S_MSGEN# input set-up time
S_MSGEN# input hold time
S_EOF# input set-up time
S_EOF# input hold time
S_IRDY input set-up time
S_IRDY input hold time
6
6
6
6
6
6
6
14
14
14
14
14
14
14
18
18
18
18
5
5
5
5
5
5
5
11
11
11
11
11
11
11
15
15
15
15
4
4
4
4
4
4
4
8.5 CL = 50pf
8.5 CL = 50pf
8.5 CL = 50pf
8.5 CL = 50pf
8.5 CL = 50pf
8.5 CL = 50pf
8.5 CL = 20pf
12
S2
S3
S4
S6
S7
S8
S12
S13
S14
S15
S17
S18
S19
S20
S21
S22
S23
S24
S27
S28
S29
S30
S31
S32
S33
S34
12
12
12
2
1.5
4.5
1.5
4.5
1.5
4.5
1.5
4.5
10
1
3.5
1
5.5
2
5.5
2
3.5
1
5.5
2
3.5
1
5.5
13
5.5
2
3.5
8
S_TABT# input set-up time
S_TABT# input hold time
S_HPREQ# input set-up time
S_HPREQ# input hold time
S_GNT# input set-up time
S_GNT# input hold time
4.5
1.5
4.5
10
3.5
1
5.5
13
5.5
15
5.5
3.5
8
4.5
12
3.5
9
S_OVLD# input set-up time
S_OVLD# input hold time
4.5
3.5
AC Characteristics – XpressFlow Bus Interface
© 1998 Zarlink Semiconductor, Inc.
22
Rev. 2.1- February, 1999
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
