CC1110-RTR1 datasheet(158/203 Pages) TI

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CC1110

CC1110 PRELIMINARY Datasheet (Rev. 1.01) SWRS033A

Page 158 of 202

RFIM (0x91) – RF Interrupt Mask

Bit

Name

Reset

R/W

Description

7:6

Not used

RX timeout, no packet has been received in the programmed period.

Interrupt disabled

IM_TIMEOUT

R/W

Interrupt enabled

Packet received/transmitted. Also used to detect underflow/overflow

conditions.

Interrupt disabled

IM_DONE

R/W

Interrupt enabled

Carrier sense.

Interrupt disabled

IM_CS

R/W

Interrupt enabled

Preamble quality reached.

Interrupt disabled

IM_PQT

R/W

Interrupt enabled

Clear Channel Assessment

Interrupt disabled

IM_CCA

R/W

Interrupt enabled

Start of Frame Delimiter, sync word detected

Interrupt disabled

IM_SFD

R/W

Interrupt enabled

15.4 TX/RX Data Transfer

Transmit data is written to the radio when

writing to the RF Data register, RFD.

Received data is returned when the RFD

It is required that the user software uses

FIFO structures in memory to implement

RX and TX FIFOs. In most cases it is

recommended that the transfer of data

between FIFOs in memory and the RF

Data register, RFD, involves the use of

DMA

channels

with

RFD

source/destination

and

DMA

trigger

RADIO. For description on the usage of

DMA, refer to section 13.2 on page 78.

A simple example of writing TX data to the

radio is shown in Figure 35. This example

does not use DMA, but illustrates some of

the basic principles.

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