Quatech 802.11B/G Manual de usuario descargar pdf (Pagina 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

MAX

Maximum Clock Frequency

8.00

MHz

SPI Select Low to Clock Rising Edge

100

Clock High

62.5

Clock Low

62.5

Clock High to Data Out

Clock Low to Data In Valid Set-up time

Clock Low to Data Valid Hold time

CSH

Clock Falling Edge to SPI Select High

100

DELAY

SPI Select High to SPI Select Low

µs

Figure 3 - SPI Read/Write Timing

Figure 4 - SPI Clock and Select Timing

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 39 40

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Quatech 802.11B/G Manual de usuario Pagina 22