參數(shù)資料
型號: XE8806AMI026TLF
廠商: Semtech
文件頁數(shù): 109/143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(22 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: 剪切帶 (CT)
供應商設備封裝: 32-TQFP(7x7)
配用: XE8000MP-ND - PROG BOARD AND PROSTART2 CARD
其它名稱: XE8806AMI026CT
Semtech 2006
www.semtech.com
11-5
XE8806A/XE8807A
The snap-to-rail function connects a pullup or pulldown resistor to the input pin depending on the value forced on
the input pin. This function can be used for instance when the input port is connected to a tristate bus. When the
bus is floating, the pullup or pulldown maintains the bus in the last low impedance state before it became floating
until another low impedance output drives the bus. It also reduces the power consumption with respect to a classic
pullup since it selects the pullup or pulldown resistor so that it confirms the detected input state.
The state of input pin is summarized in the table below.
PAPullup[x]
PASnaptorail[x]
(last) externally
forced PA[x]
value
PA[x] pull
0
x
floating
1
0
x
pullup
1
0
pulldown
1
pullup
Table 11-11: Snap-to-rail
Port A starts up with the pullup resistor connected and the snap-to-rail function disabled.
Port A as an interrupt source:
Each Port A input is an interrupt request source and can be set on rising or falling edge with the corresponding bit
in RegPAEdge. After reset, the rising edge is selected for interrupt generation by default. The interrupt source can
be debounced by setting register RegPADebounce. The interrupt signals are sampled on the fastest clock in the
circuit. In order to guarantee that the circuit detects the interrupt, the minimal pulse length should be 1 cycle of this
clock.
Note: care must be taken when modifying RegPAEdge because this register performs an edge selection. The
change of this register may result in a transition, which may be interpreted as a valid interruption.
Port A as an event source:
The interrupt signals of the pins PA[0] and PA[1] are also available as events on the event controller.
Port A as a clock source (product dependent):
Images of the PA[0] to PA[3] input ports (debounced or not) are available as clock sources for the
counter/timer/PWM peripheral.
Port A as a reset source:
Port A can be used to generate a system reset by placing a predetermined word on Port A externally. The reset is
built using a logical and of the 8 PARes[x] signals:
resetfromportA = PAReset[7] AND PAReset[6] AND PAReset[5] AND ... AND PAReset[0]
PAReset[x] is itself a logical function of the corresponding pin PA[x]. One of four logical functions can be selected
for each pin by writing into two registers RegPARes0 and RegPARes1 as shown in Table 11-12.
PARes1[x]
PARes0[x]
PAReset[x]
0
1
PA[x]
1
0
not(PA[x])
1
Table 11-12: Selection bits for reset signal
A reset from Port A can be inhibited by placing a 0 on both PARes1[x] and PARes0[x] for at least 1 pin. Setting
both PARes1[x] and PARes0[x] to 1, makes the reset independent of the value on the corresponding pin. Setting
both registers to hFF, will reset the circuit independent from the Port A input value. This makes it possible to do a
reset by software.
相關PDF資料
PDF描述
395-026-540-804 CARD EDGE 26POS DL .100X.200 BLK
DS1270Y-100# IC NVSRAM 16MBIT 100NS 36DIP
DS1270W-150# IC NVSRAM 16MBIT 150NS 36DIP
DS1270W-100# IC NVSRAM 16MBIT 100NS 36DIP
AYF337365 CONN FPC 73POS SMD Y3BW
相關代理商/技術參數(shù)
參數(shù)描述
XE8806ARI000 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Ultra Low-Power Low-Voltage
XE8806ARI026LF 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Ultra Low-Power Low-Voltage
XE8807AMI000 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Ultra Low-Power Low-Voltage
XE8807AMI026LF 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Ultra Low-Power Low-Voltage
XE8807AMI026TLF 功能描述:IC MCU LOW PWR MTP FLASH 32-TQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器 - 特定應用 系列:XE880x 產(chǎn)品變化通告:Product Discontinuation 26/Aug/2009 標準包裝:250 系列:- 應用:網(wǎng)絡處理器 核心處理器:4Kc 程序存儲器類型:- 控制器系列:- RAM 容量:16K x 8 接口:以太網(wǎng),UART,USB 輸入/輸出數(shù):- 電源電壓:1.8V, 3.3V 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:208-LQFP 包裝:帶卷 (TR) 供應商設備封裝:PG-LQFP-208 其它名稱:SP000314382