ppc460ex Applied Micro Circuits Corporation (AMCC), ppc460ex Datasheet - Page 90

• Manufacturer Part Number: ppc460ex
• Description: Powerpc 460ex Embedded Processor
• Manufacturer: Applied Micro Circuits Corporation (AMCC)

460EX – PPC460EX Embedded Processor
Table 22. I/O Timing—DDR SDRAM T
Notes:
1. All of the DQS signals are referenced to MemClkOut with the DQS delay line programmed to 1 cycle.
2. Clock speed is 200MHz.
Table 23. I/O Timing—DDR SDRAM T
Notes:
1. Clock speed is 200MHz. T
2. The timing in this table assumes a single registered DIMM load on the outputs. To adjust the timing for unbuffered DIMMs,
3. To obtain adjusted T
4. To obtain adjusted T
90
DQS0
DQS1
DQS2
DQS3
DQS4
DQS5
DQS6
DQS7
DQS8
MemAddr00:13
BA0:2
BankSel0:1
ClkEn0:3
CAS
RAS
WE
use the following values by subtracting them from T
18 loads adjust by 2.12ns
9 loads adjust by 1.12ns
5 loads adjust by 0.41ns
Signal Name
Signal Name
SA
HA
values for lower clock frequencies, use 1/2 of the cycle time for the lower clock frequency.
values for lower clock frequencies, use 1/2 of the cycle time for the lower clock frequency.
SA
and T
HA
are referenced to MemClkOut rising edge.
DS
SA
, and T
HA
SA
and adding them to T
Minimum
Minimum
T
SA
1.08
1.17
1.12
1.11
1.16
1.17
1.17
4.9
4.9
4.9
4.9
4.9
4.9
4.9
4.9
4.9
(ns)
HA
T
DS
:
(ns)
Preliminary Data Sheet
Revision 1.12 – July 17, 2008
Maximum
Minimum
T
HA
1.18
1.19
1.15
1.15
1.14
1.13
1.17
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
(ns)
AMCC Proprietary