RFM95 datasheet(65/121 Pages) HOPERF

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Page 65

RFM95/96/97/98(W)

Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales@hoperf.com http:// www.hoperf.com

WIRELESS & SENSING

PRELIMINARY

DATASHEET

4.2.12. Continuous Mode

4.2.12.1. General Description

As illustrated in Figure 29, in Continuous mode the NRZ data to (from) the (de)modulator is directly accessed by the uC on

the bidirectional DIO2/DATA pin. The FIFO and packet handler are thus inactive.

Tx/Rx

CONTROL

DIO0

DIO1/DCLK

DIO2/DATA

DIO3

DIO4

DIO5

Data

SYNC

RECOG.

SPI

NSS

SCK

MOSI

MISO

Figure 29. Continuous Mode Conceptual View

4.2.12.2. Tx Processing

In Tx mode, a synchronous data clock for an external uC is provided on DIO1/DCLK pin. Clock timing with respect to the

data is illustrated in Figure 30. DATA is internally sampled on the rising edge of DCLK so the uC can change logic state

anytime outside the grayed out setup/hold zone.

T_DATA

DATA

(NRZ)

DCLK

Figure 30. Tx Processing in Continuous Mode

Note

the use of DCLK is required when the modulation shaping is enabled (see section 3.4.5).

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