參數(shù)資料
型號: OL2381AHN
廠商: NXP Semiconductors N.V.
元件分類: 微波射頻器件
英文描述: Highly Integrated Single Chip Sub 1-GHz RF Transceiver
封裝: OL2381AHN<SOT617-3 (HVQFN32)|<<http://www.nxp.com/packages/SOT617-3.html<1<Always Pb-free,;
文件頁數(shù): 30/43頁
文件大?。?/td> 2978K
代理商: OL2381AHN
AN11017
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Application note
Rev. 2 — 10 May 2011
30 of 43
NXP Semiconductors
AN11017
Transceiver OL2381 using wireless M-BUS
6.7 RX sequence
The following RX sequence (see
Figure 35
) is used in this example:
WUPS (Wake-UP Search)
Preamble detection (find synchronization word)
Data reception
Remark:
In this example, all signal monitors (see
Section 6.8
) are disabled. Therefore the
“stop condition” never occurs. However, the advantage of WUPS in this example is that
the LNA gain is selected automatically; see
Section 6.1
.
The previous sequence can be set with register RX_FOLLOWUP; see
Figure 36
.
Table 31.
M-Bus radio link
Fig 35. RX sequence
Fig 36. Register RX_FOLLOWUP
M-Bus RX_FOLLOWUP register settings
OL2381 register address
RX_FOLLOWUP (0x36)
S, T, C, R, F
0x8C
Information
see
Figure 35
= 01 (WUPS)
No
RX Command
WUPS
Successful
During WUPS, the signal strenght will be
analysed, and LNA gain will be adjusted
During Preamble Detection the
synchronisation word is searched
WUPS_FU_CF = 0
019aab787
Start DATA
Reception
Stop
WUPS_FU_CS = 10
No
Yes
Yes
WUPS
Successful
PREA_FU_CF = 0
Stop
019aab788
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