AT86RF233 datasheet(39/196 Pages) ATMEL

39 / 196 page

8351B–MCU Wireless–06/12

AT86RF233

7.1.4.5 BUSY_TX and RX_ON States

The transition from PLL_ON to BUSY_TX state and subsequently to RX_ON state is

shown in Figure 7-7.

Figure 7-7. PLL_ON to BUSY_TX to RX_ON Timing.

Time [µs]

x + 32

Time

tTR11

tTR10

Command

RX_ON

State

Block

PLL_ON

RX_ON

BUSY_TX

SLP_TR

PLL

PA, TX

PLL

or command TX_START

Starting from PLL_ON state it is further assumed that the PLL is already locked. A

transmission is initiated either by a rising edge of pin 11 (SLP_TR) or by command

TX_START, the Atmel AT86RF233 changes into BUSY_TX state.

The PLL settles to the transmit frequency and the PA is enabled. tTR10 = 16µs after

initiating the transmission starts the internally generated SHR transmission. After that

the PSDU data are transmitted from the Frame Buffer.

After completing the frame transmission, indicated by IRQ_3 (TRX_END), the PLL

settles back to the receive frequency within tTR11 = 32µs in state PLL_ON.

If during TX_BUSY the radio transmitter is programmed to change to a receive state it

automatically proceeds the state change to RX_ON state after finishing the

transmission.

7.1.4.6 Reset Procedure

The radio transceiver reset procedure is shown in Figure 7-8.

Figure 7-8. Reset Procedure.

Event

State

Block

Time [μs]

Pin /RST

TRX_OFF

x + 30

[IRQ_4 (AWAKE_END)]

various

Time

>t10

tTR13

>t11

XOSC, DVREG

x + 10

FTN

Note:

Timing figure tTR13 refers to Table 7-1, t10, t11 refers to Section 12.4.

AT86RF233 Datasheet(PDF) 39 Page - ATMEL Corporation

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