Rainbow-electronics ATmega128RFA1 Manuel d'utilisateur télécharger pdf (Page 48)

48

8266A-MCU Wireless-12/09

ATmega128RFA1

Figure 9-19. Flow Diagram of RX_AACK

Reserved Frames

TRX_STATE = RX_AACK_ON

SHR detected

TRX_STATE = BUSY_RX_AACK

Scanning MHR

Frame reception

Frame

Filtering

ACK requested

(see Note 3)

Wait 12 symbol

periods

Transmit ACK

TRX_STATE = RX_AACK_ON

N

Y

N

Y

Generate TRX24_RX_START

interrupt

AACK_PROM_MODE

== 1

Generate TRX24_XAH_AMI

interrupt

Y

Generate TRX24_RX_END

interrupt

Frame reception

Note 3: Additional conditions:

- ACK requested &

- ACK_DIS_ACK==0 &

- frame_version<=AACK_FVN_MODE

Slotted Operation

== 0

Y

AACK_ACK_TIME

== 0

Y

Wait 2 symbol

periods

Wait 6 symbol

periods

SLPTR bit

= 1

N

N

Generate

TRX24_RX_END

interrupt

N

Y

N

AACK_ACK_TIME

== 0

Y

Wait 2 symbol

periods

N

FCS valid

(see Note 2)

Y

N

AACK_UPLD_RES_FT

== 1

FCS valid

Generate

TRX24_RX_END

interrupt

Y

Y

N

N

N

Note 2: FCS check is omitted for Promiscous Mode

FCF[2:0]

> 3

N

Y

Y

Promiscuous Mode

Note 1: Frame Filtering, Promiscuous Mode and

Reserved Frames:

- A radio transceiver in Promiscuous

Mode, or configured to receive Reserved

Frames handles received frames passing

the third level of filtering

- For details refer to the description of

Promiscuous Mode and Reserved

Frame Types

(see Note 1)

GenerateTRX24_TX_END

interrupt

1 2 ... 43 44 45 46 47 48 49 50 51 52 53 ... 523 524

Commentaires sur ces manuels

Pas de commentaire