MC13202 Technical Data, Rev. 1.4

Freescale Semiconductor

7

Figure 5. Reported Power Level Versus Input Power for Energy Detect or Link Quality Indicator

4.3

Transmit Path Description

For the transmit path, the TX data that was previously stored in RAM is retrieved (packet mode) or the TX

data is clocked in via the SPI (stream mode), formed into packets per the 802.15.4 PHY, spread, and then

up-converted to the transmit frequency.

If the MC13202 is in packet mode, data is processed as an entire packet. The data are first loaded into the

TX buffer. The MCU then requests that the MC13202 transmit the data. The MCU is notified via an

interrupt when the whole packet has successfully been transmitted.

In streaming mode, the data is fed to the MC13202 on a word-by-word basis with an interrupt serving as

a notification that the MC13202 is ready for more data. This continues until the whole packet is

transmitted.

-85

-75

-65

-55

-45

-35

-25

-15

-85

-75

-65

-55

-45

-35

-25

-15

Input Power Level (dBm)

802.15.4 Accuracy

and Range Requirements