參數(shù)資料
型號(hào): XE8000EV108
廠商: Semtech
文件頁數(shù): 139/143頁
文件大?。?/td> 0K
描述: EVAL BOARD FOR XE8806/XE8807
標(biāo)準(zhǔn)包裝: 1
類型: MCU
適用于相關(guān)產(chǎn)品: XE88LC06AMI026
所含物品: 完全組裝的評(píng)估板
產(chǎn)品目錄頁面: 585 (CN2011-ZH PDF)
Semtech 2006
www.semtech.com
14-15
XE8806A/XE8807A
If the XE1201A is used as a transmitter only, the connections RFIF0 – RXD and RFIF1 – CLKD are not required.
The RXTX pin of the XE1201A can be permanently connected to the ground. RFIF0 and RFIF1 may remain
floating.
If the XE1201A is used as a receiver only, the connection RFIF3 – TXD is not required. The pin TXD and the pin
TXRX can be permanently connected to VDD. If the bit synchronizer in the XE1201A is not used, the connection
RFIF1 – CLKD is not required.
If the XE1201A transmitter is permanently enabled, the pin EN can be permanently connected to VDD.
This documentation shows how to set-up the data transmission between the microcontroller and the XE1201A. For
detailed information on the XE1201A functionality, external components, serial interface protocol and register set-
up, please refer to the XE1201A datasheet.
RFIF0
RFIF1
RFIF2
RFIF3
TXD
RXD
CLKD
XE1201
[clock]
data
XE8000
EN
RXTX
data
DE
SC
SD
RF
i
n
ter
face
parallel port
har
dw
are
or
s
o
ft
w
ar
e
SP
I
SS
SCK
MOSI
register A
register B
register C
RegRfifCmd2
RegRfifCmd3
RegRfifTx
RegRfifTxSta
RegRfifRx
RegRfifRxSta
RegRfifRxSPat
RegRfifCmd1
MISO
Figure 14-8 : Configuration of the connections between the microcontroller and XE1201A
14.12.1.2 Reception mode using NRZ coding and the XE1201A bit synchronizer
The protocol of the messages received is NRZ level. The start sequence of the message is a 11010111 pattern
and the message length after the start sequence is 8 bytes. The messages are sent at a data rate of 16 kbit/s. The
following paragraphs will show how to set-up the XE1201A, how to set-up the RF interface and how to handle the
received data.
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