MRF24WN0MA Datasheet, PDF (12/36 Pages) Microchip Technology – 2.4 GHz IEEE 802.11b/g/n Wireless Module

MRF24WN0MA/MB
2.3 SPI Port Pins
The MRF24WN0MA/MB module interfaces to the
PIC32 MCU via a 4-wire SPI port. Refer to Figure 2-2
and Table 2-2 for the necessary signaling conditions.
In the case of the SPI_CS/MODE1 pin, pull-up using a
10 k resistor and the host MCU allows an active-high
signal during power on and wake-up to ensure that the
module start-up in normal operation. Once the module
is operational, the pin becomes the SPI Port Chip
Select pin (active-low).
FIGURE 2-2:
SPI SLAVE INTERFACE TIMING
Clock
MOSI
MISO
f_PP
t_WL
t_THL
t_ISU
t_WH
t_TLH
t_IH
t_{O_DLY(max)}
t_{O_DLY(min)}
V_IH
V_IL
V_IH
V_IL
V_OH
V_OL
TABLE 2-2:
Parameter
f_PP
t_WL
t_WH
t_TLH
t_THL
t_ISU
t_IH
t_{O_DLY}
SPI SLAVE TIMING CONSTRAINTS
Description
Clock Frequency
Clock Low Time
Clock High Time
Clock Rise Time
Clock Fall Time
Input Setup Time
Input Hold Time
Output Delay
Min.
0
8.3
8.3
—
—
5
5
0
Max.
48
—
—
2
2
—
—
5
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
DS50002410A-page 12
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