mt90224 Zarlink Semiconductor, mt90224 Datasheet - Page 137

• Manufacturer Part Number: mt90224
• Description: 8-port Ima/tc Phy Device
• Manufacturer: Zarlink Semiconductor

Note
Note 1: t
AC Electrical Characteristics - External Memory Interface Timing - Read Access
System Clock
t
t
t
t
t
t
t
t
t
RC
AVRS
AVRH
CSRS
CSRH
WERS
WERH
RDS
RDH
Note: SRAM Control Register Table
Item
SR_A[18:0]
‡
SR_D[7:0]
: Typical figures are at 25
SR_WE
SR_CS
RC
= t
CLK
MT90222/3/4 System Clock Period
Read Cycle Time
Address Setup Time
Address Hold Time
Chip Select Setup Time
Chip Select Hold Time
Write Enable* Setup Time
Write Enable* Hold Time
Data Setup Time
Data Hold Time
- t
CSRS
- t
RDS
°
.
Figure 29 - External Memory Interface Timing - Read Cycle
C, V
Description
DD
=3.3 V, and for design aid only: not guaranteed and not subject to production testing.
t
avrs
Zarlink Semiconductor Inc.
t
csrs
MT90222/3/4
t
wers
137
t
rc
Address Valid
10 ns
1.5 ns
19 ns
Min.
0 ns
0 ns
1 ns
1 ns
0 ns
1 ns
0 ns
Data Valid
t
rds
1
t
csrh
t
rdh
20 ns
Typ.
t
avrh
t
werh
‡
t
clk
Data Sheet
9.5 ns
7.5 ns
9.5 ns
Max.
0
.