st20-gp1 STMicroelectronics, st20-gp1 Datasheet - Page 102

• Manufacturer Part Number: st20-gp1
• Description: Gps Processor
• Manufacturer: STMicroelectronics

ST20-GP1
19 Timing specifications
19.1 EMI timings
The timings are based on a 50 pF load, and are taken at a threshold of 1.5 V.
Note: The ‘Reference clock’ used in the EMI timings is a virtual clock and is defined as the point at
which all data and address outputs are valid. This is designed to remove process dependent skews
from the datasheet description and highlight the dominant influence of address and data timings on
memory system design.
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Symbol Parameter
t
t
t
t
t
t
t
t
CHAV
CLSV
CHSV
RDVCH
CHRDX
CHWDV
WVCH
CHWX
Reference clock high to Address valid
Reference clock low to Strobe valid
Reference clock high to Strobe valid
Read Data valid to Reference clock high
Read Data hold after Reference clock high
Reference clock high to Write Data valid
MemWait valid to Reference clock high
MemWait hold after Reference clock high
Table 19.1 EMI cycle timings
-11.0
32.0
27.0
Min
-9.0
-9.0
-9.0
-9.0
-6.0
Max
0.0
3.0
0.0
2.0
-
-
-
-
Units Notes
ns
ns
ns
ns
ns
ns
ns
ns