CX82100 Home Network Processor Data Sheet
6.2
Available Vendor SDRAM ICs and Features
Although the EMAC is not fully PC100 compliant due to the fact that both the CAS#
latency and the burst length are hard wired, many other PC100 compliant vendor
SDRAMs are usable for the EMAC design. Table 6-3 lists some of these SDRAMs and
their corresponding features and access timings.
Table 6-3. Available SDRAM Vendors
1M x 16 x 4 SDRAM
Input
Spec./
Vendor
Basic
Features
Ref.
Rate
Clock
Cycle
Output
Initialization
Sequence
Setup
2 ns
Hold
1 ns
Valid
CL = 3: 6 ns
CL = 2: 6 ns
Hold
3 ns
Valid to Z
Min: 3 ns
Max: 9 ns
Intel
PC100 Spec.
(Rev. 1.63)
CL = 2,3
BL = 1,2,4
Burst Read
Burst Write
Auto Refresh
Period: 10 ns
High: 3 ns
Low: 3 ns
200µs -> Precharge ->
8RF -> MRS-> 1st
Command
Micron
CL = 1,2,3
15.6µs
CL = 3: 8 ns
CL = 2: 10 ns
2 ns
1 ns
CL = 3: 6 ns
CL = 2: 6 ns
1.8 ns CL = 3: 6 ns 100µs -> Precharge ->
CL = 2: 7 ns 2RF min -> MRS -> 1st
Command
MT48LC4M16A2 BL = 1,2,4,8,FP
Burst Read
Burst Write
Single Write
Auto Refresh
Self Refresh
Samsung
KM416S4030D
CL = 2,3
15.6µs
15.6µs
Period: 10 ns
2 ns
2 ns
1 ns
1 ns
CL = 3: 6 ns
CL = 2: 6 ns
3 ns
3 ns
CL = 3: 6 ns 100µs -> Precharge ->
CL = 2: 7 ns 2RF min -> MRS-> 1st
Command
BL = 1,2,4,8,FP
Burst Read
Burst Write
Auto Refresh
Self Refresh
Fujitsu
MB81F641642D
CL = 2,3
Period: 10 ns
High: 3 ns
Low: 3 ns
CL = 3: 6 ns
CL = 2: 6 ns
Min: 3 ns
Max: 6 ns
100µs -> Precharge ->
2RF min -> MRS-> 1st
Command
BL = 2,4,8,FP
Burst Read
Burst Write
Single Write
Auto Refresh
Self Refresh
NEC
PD4564841-10
CL = 2,3
15.6µs
15.6µs
15.6µs
CL = 3: 10 ns
CL = 2: 13 ns
High: 3 ns
2 ns
3 ns
1 ns
1 ns
CL = 3: 6 ns
CL = 2: 7 ns
3 ns
3 ns
3 ns
CL = 3: 6 ns 200µs -> Precharge ->
CL = 2: 7 ns 2RF min -> MRS-> 1st
BL = 1,2,4,8,FP
Burst Read
Single Write
Auto Refresh
Self Refresh
Min: 3 ns
Command
Low: 3 ns
IBM
19L3264-10
CL = 2,3
CL = 3: 10 ns
CL = 2: 15 ns
CL = 3: 7 ns
CL = 2: 8 ns
Min: 3 ns
Max: 7 ns
200µs -> Precharge ->
8RF -> MRS-> 1st
Command
BL = 1,2,4,8,FP
Burst Read
Single Write
Auto Refresh
Self Refresh
Toshiba
TC59S6416BFT-
10
CL = 2,3
10 ns
2.5 ns 1 ns
7 ns
Min: 3 ns
Max: 10 ns
200µs -> Precharge ->
8RF -> MRS-> 1st
Command
BL = 1,2,4,8,FP
Burst Read
Single Write
Auto Refresh
Self Refresh
101306C
Conexant Proprietary and Confidential Information
6-3
CONEXANT [ CONEXANT SYSTEMS, INC ]
