參數(shù)資料
型號: XE8807AMI026TLF
廠商: Semtech
文件頁數(shù): 26/143頁
文件大小: 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(chǎn)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
16-6
XE8806A/XE8807A
S0
UsrtWaitS0
write Reg UsrtBufferS1
S1
Figure 16-4: Conditional stretching (UsrtEnWaitCond1=1)
When UsrtEnWaitCond1 is 1, the S0 signal will be stretched in its low state after its falling edge if the condition 1
has been detected before (UsrtCond1=1). UsrtWaitS0 is then set to 1, indicating that the S0 line is forced low.
One can release S0 by writing to the RegUsrtBufferS1 register.
Figure 16-5 shows the sampling function implemented by the UsrtBufferS1 bit. The bit UsrtBufferS1 in
RegUsrtBufferS1 is the value of S1 sampled on PB[4] at the last rising edge of S0. The bit UsrtEdgeS0 in
RegUsrtEdgeS0 is set to one on the same S0 rising edge and is cleared by a read operation of the
RegUsrtBufferS1 register. The bit therefor indicates that a new value is present in the RegUsrtBufferS1 which
was not yet read.
S0
UsrtBufferS1
read Reg UsrtBufferS1
S1
UsrtEdgeS0
Figure 16-5: S1 sampling
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