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参数资料
| 型号： | I5104XY |
| 厂商： | WINBOND ELECTRONICS CORP |
| 元件分类： | 音频合成 |
| 英文描述： | 262.2 SEC, SPEECH SYNTHESIZER WITH RCDG, UUC25 |
| 封装： | DIE-25 |
| 文件页数： | 61/87页 |
| 文件大小： | 616K |
| 代理商： | I5104XY |
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65
8393B-MCU Wireless-02/13
ATmega256/128/64RFR2
Value
Name
Description
5
NO_ACK
No acknowledgement frames were received
during all retry attempts
7
INVALID
Entering TX_ARET mode sets
TRAC_STATUS = 7
Note that if no ACK is expected (according to the content of the received frame in the
Frame Buffer), the radio transceiver issues a TRX24_TX_END interrupt directly after
the frame transmission has been completed. The value of the bits TRAC_STATUS of
register TRX_STATE is set to SUCCESS.
A value of MAX_CSMA_RETRIES = 7 initiates an immediate TX_ARET transaction
without performing CSMA-CA. This is required to support slotted acknowledgement
operation. Further the value MAX_FRAME_RETRIES is ignored and the TX_ARET
transaction is performed only once.
A timing example of a TX_ARET transaction is shown in Figure 9-14 below .
Figure 9-14. Example Timing of a TX_ARET Transaction
R
X
/T
X
F
ra
m
e
o
n
A
ir
TX_ARET_ON
BUSY_TX_ARET
TRX_STATE
FrameType
TX_ARET_ON
RX/TX
RX
RX_END
IRQ
Typ. Processing Delay
16 s
672
0
x
time [s]
128
x+352
SLPTR
TX
tIRQ
Data Frame (Length = 10, ACK=1)
ACK Frame
32 s
tCSMA-CA
TX
CSMA-CA
RX
Note:
1. tCSMA-CA defines the random CSMA-CA processing time.
Here an example data frame of length 10 with an ACK request is transmitted, see Table
9-16 on page 66. After the transmission the radio transceiver switches to receive mode
and expects an acknowledgement response. During the whole transaction including
frame transmit, wait for ACK and ACK receive the radio transceiver status register
TRX_STATUS signals BUSY_TX_ARET.
A
successful
reception
of
the
acknowledgment
frame
is
indicated
by the
TRX24_TX_END interrupt. The status register TRX_STATUS changes back to
TX_ARET_ON. The TX_ARET status register TRAC_STATUS changes as well to
TRAC_STATUS = SUCCESS or TRAC_STATUS = SUCCESS_DATA_PENDING if the
frame pending subfield of the received ACK frame was set to 1.
9.4.2.7 Interrupt Handling
The interrupt handling in the Extended Operating Mode is similar to the Basic Operating
Mode (see section "Interrupt Handling" on page 42). The microcontroller enables
interrupts by setting the appropriate bit in register IRQ_MASK.
For RX_AACK and TX_ARET the following interrupts (Table 9-16 on page 66) inform
about the status of a frame reception and transmission:
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