Quatech 802.11B/G - Manual (Page 22)

Quatech, Inc. Airborne Enterprise Module Databook
22 7/15/2010 100-8080-120
7.2 SPI AC Characteristics
The following specification identifies the required hardware timing to successfully
implement a SPI interface with the Airborne Device Server module.
Table 12 - SPI AC Timings
Symbol Parameter Min Typ Max Units
f
MAX
Maximum Clock Frequency 8.00 MHz
t
CS
SPI Select Low to Clock Rising Edge 100 ns
t
CH
Clock High 62.5 ns
t
CL
Clock Low 62.5 ns
t
DA
Clock High to Data Out 60 ns
t
DS
Clock Low to Data In Valid Set-up time 14 ns
t
DH
Clock Low to Data Valid Hold time 2 ns
t
CSH
Clock Falling Edge to SPI Select High 100 ns
t
DELAY
SPI Select High to SPI Select Low 40 µs
Figure 3 - SPI Read/Write Timing
Figure 4 - SPI Clock and Select Timing