參數(shù)資料
型號： XE8806AMI026TLF
廠商： Semtech
文件頁數(shù)： 123/143頁
文件大?。?/td> 0K
描述： IC MCU LOW PWR MTP FLASH 32-TQFP
標(biāo)準(zhǔn)包裝： 1
系列： XE880x
應(yīng)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(yīng)商設(shè)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
13-4
XE8806A/XE8807A
PDPullup[x] is 0, the pull-ups on the pins PD[2x] and PD[2x+1] are disabled. When a bit PDPullup[x] is set to 1
and the bit PDSnapToRail[x] is set to 0, the pull-up resistor is connected to the pins PD[2x] and PD[2x+1]. When
both PDPullup[x] and PDSnapToRail[x] are 1, the snap-to-rail function is active on the pins PD[2x] and PD[2x+1].
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 is driving 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 function is summarised in the table below as a function of the different register settings.
PDDir[2x(+1)]
PDPullup[x]
PDSnapToRail[x]
(last) externally
forced
PD[2x(+1)] value
PD[2x(+1)] pull
resistor
1
x
not connected
0
x
not connected
0
1
0
x
pullup
0
1
0
pulldown
0
1
pullup
Table 13-6: Snap-to-rail and pullup function
At power-on reset, Port D is configured as an input port with all pull-ups active.
13.5
Port D electrical specification
sym
description
min
typ
max
unit
Comments
VINH
Input high voltage
0.7*VBAT
VBAT
V
VBAT
≥2.4V
VINL
Input low voltage
VSS
0.2*VBAT
V
VBAT
≥2.4V
VOH
Output high voltage
VBAT-0.4
VBAT
V
VBAT=1.2V, IOH =0.3mA
VBAT=2.4V, IOH =5.0mA
VBAT=4.5V, IOH =8.0mA
VOL
Output low voltage
VSS
VSS+0.4
V
VBAT=1.2V, IOL =0.3mA
VBAT=2.4V, IOL
=12.0mA
VBAT=4.5V, IOL
=15.0mA
RPU
Pull-up resistance
20
50
80
k
Cin
Input capacitance
3.0
pF
Note 1
Note 1: this value is indicative only since it depends on the package.
Table 13-7. Port D electrical specification
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XE8806ARI026LF 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Ultra Low-Power Low-Voltage
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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(yīng)用 系列:XE880x 產(chǎn)品變化通告:Product Discontinuation 26/Aug/2009 標(biāo)準(zhǔn)包裝:250 系列:- 應(yīng)用:網(wǎng)絡(luò)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(yīng)商設(shè)備封裝:PG-LQFP-208 其它名稱:SP000314382
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