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參數(shù)資料
| 型號(hào)： | MQ80C52XXX-25 |
| 廠商： | TEMIC SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 25 MHz, MICROCONTROLLER, CQFP44 |
| 文件頁(yè)數(shù)： | 179/198頁(yè) |
| 文件大小： | 4822K |
| 代理商： | MQ80C52XXX-25 |
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81
8111C–MCU Wireless–09/09
AT86RF231
Bit [2:0]:
describes the frame type. Table 8-2 on page 81 summarizes frame types defined by IEEE
802.15.4, section 7.2.1.1.1.
This subfield is used for address filtering by the third level filter rules. Only frame types 0 - 3 pass
the third level filter rules, refer to Section 7.2.3.5 “Frame Filtering” on page 61 Automatic address
filtering by the AT86RF231 is enabled when using the RX_AACK mode, refer to Section 7.2.3
However, a reserved frame (frame type value > 3) can be received if register bit
AACK_UPLD_RES_FT (register 0x17, XAH_CTRL_1) is set, for details refer to Section 7.2.3.3
Address filtering is also provided in Basic Operating Mode, refer to Section 7.1 “Basic Operating
Bit 3:
indicates whether security processing applies to this frame.
Bit 4:
is the "Frame Pending" subfield. This field can be set in an acknowledgment frame (ACK) in
response to a data request MAC command frame. This bit indicates that the node, which trans-
mitted the ACK, has more data to send to the node receiving the ACK.
For acknowledgment frames automatically generated by the AT86RF231, this bit is set accord-
ing to the content of register bit AACK_SET_PD in register 0x2E (CSMA_SEED_1) if the
received frame was a data request MAC command frame.
Bit 5:
forms the "Acknowledgment Request" subfield. If this bit is set within a data or MAC command
frame that is not broadcast, the recipient shall acknowledge the reception of the frame within the
time specified by IEEE 802.15.4 (i.e. within 192 s for non beacon-enabled networks).
The radio transceiver parses this bit during RX_AACK mode and transmits an acknowledgment
frame if necessary.
In TX_ARET mode this bit indicates if an acknowledgement frame is expected after transmitting
a frame. If this is the case, the receiver waits for the acknowledgment frame, otherwise the
TX_ARET transaction is finished.
Table 8-2.
Frame Control Field - Frame Type Subfield
Frame Control Field Bit Assignments
Description
Frame Type Value
b2 b1 b0
Value
000
0
Beacon
001
1
Data
010
2
Acknowledge
011
3
MAC command
100 - 111
4 - 7
Reserved
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| MQ80C32E-36SC | 8-BIT, 36 MHz, MICROCONTROLLER, CQFP44 |
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