MRF24WN0MB datasheet(12/36 Pages) MICROCHIP

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MRF24WN0MA/MB

DS50002410A-page 12

Advance Information

 2015 Microchip Technology Inc.

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

TABLE 2-2:

SPI SLAVE TIMING CONSTRAINTS

Parameter

Description

Min.

Max.

Unit

fPP

Clock Frequency

MHz

tWL

Clock Low Time

8.3

—

tWH

Clock High Time

8.3

—

tTLH

Clock Rise Time

—

tTHL

Clock Fall Time

—

tISU

Input Setup Time

—

tIH

Input Hold Time

—

tO_DLY

Output Delay

Clock

MOSI

MISO

VIH

VIL

VIH

VIL

VOH

VOL

fPP

tWL

tWH

tTLH

tTHL

tISU

tIH

tO_DLY(max)

tO_DLY(min)

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