參數(shù)資料
型號: XE8807AMI026TLF
廠商: Semtech
文件頁數(shù): 4/143頁
文件大?。?/td> 0K
描述: IC MCU LOW PWR MTP FLASH 32-TQFP
標準包裝: 1
系列: XE880x
應用: 感測機
核心處理器: Coolrisc816?
程序存儲器類型: 閃存(11 kB)
控制器系列: XE8000
RAM 容量: 512 x 8
接口: UART,USRT
輸入/輸出數(shù): 24
電源電壓: 2.4 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 32-TQFP
包裝: 標準包裝
供應商設備封裝: 32-TQFP(7x7)
產品目錄頁面: 585 (CN2011-ZH PDF)
配用: XE8000MP-ND - PROG BOARD AND PROSTART2 CARD
其它名稱: XE8807AMI026DKR
Semtech 2006
www.semtech.com
14-21
XE8806A/XE8807A
RFIF0
RFIF1
RFIF2
RFIF3
DATAIN
DATAOUT
CLKD
XE1202A
[clock]
data
XE8000
MODE(0)
MODE(1)
data
SCK
SI
SO
RF
inte
rface
parallel port
ha
rd
w
a
re
or
s
o
ft
w
a
re
SP
I
SS
SCK
MOSI
RegRfifCmd2
RegRfifCmd3
RegRfifTx
RegRfifTxSta
RegRfifRx
RegRfifRxSta
RegRfifRxSPat
RegRfifCmd1
MISO
[match]
PATTERN
MODE(2)
EN
DataOut
ADParam1
ADParam2
Pattern1
Pattern2
Pattern3
Pattern4
FSParam3
RTParam1
FSParam1
FSParam2
CLKOUT
XIN
Figure 14-9 : Configuration of the connections between the microcontroller and XE1202A
This documentation shows how to set-up the data transmission between the microcontroller and the XE1202A. For
detailed information on the XE1202A functionality, external components, serial interface protocol and register set-
up, please refer to the XE1202A datasheet.
14.12.2.2 Microcontroller clock source derived from XE1202A crystal oscillator
The XE1202A has a programmable output clock derived from the 39MHz crystal oscillator. This clock can be
routed to the external clock input of the microcontroller (see Figure 14-9 and the clock block documentation). In this
case, a precise clock derived from the XE1202A can be used to run the microcontroller in stead of the internal RC
oscillator. The advantage is that the crystal oscillator is much more precise than the internal RC but the overall
power consumption of the system will be somewhat larger.
To enable the external clock output of the XE1202A, set the bit RTParam_Clkout=1 and use the bits
ADParam_Clkfreq[1:0] to select the frequency between 9.75MHz and 1.22MHz (see XE1202A datasheet for
details).
To select the external clock in the microcontroller, set the bit EnExtClk = 1 in the register RegSysClk. Be aware
that the external clock is divided by 2 at the input (see the clock block documentation for more details).
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