参数资料
型号: XE8806AMI026TLF
厂商: Semtech
文件页数: 115/143页
文件大小: 0K
描述: IC MCU LOW PWR MTP FLASH 32-TQFP
标准包装: 1
系列: XE880x
应用: 感测机
核心处理器: Coolrisc816?
程序存储器类型: 闪存(22 kB)
控制器系列: XE8000
RAM 容量: 512 x 8
接口: UART,USRT
输入/输出数: 24
电源电压: 2.4 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 32-TQFP
包装: 剪切带 (CT)
供应商设备封装: 32-TQFP(7x7)
配用: XE8000MP-ND - PROG BOARD AND PROSTART2 CARD
其它名称: XE8806AMI026CT
Semtech 2006
www.semtech.com
12-4
XE8806A/XE8807A
Table 12-8 shows the different usages that can be made of port B with the order of priority. If a pin is selected to be
analog, it overwrites the function and digital set-up. If the pin is not selected as analog, but a function is enabled, it
overwrites the digital set-up. If neither the analog nor function is selected for a pin, it is used as an ordinary digital
I/O. This is the default configuration at start-up.
Note: the presence of the functions is product dependent.
12.5
Port B analog capability
12.5.1
Port B analog configuration
Port B terminals can be attached to a 4 line analog bus by setting the PBAna[x] bits to 1 in the RegPBAna
register.
The other registers then define the connection of these 4 analog lines to the different pads of Port B. These can be
used to implement a simple LCD driver or A/D converter. Analog switching is available only when the circuit is
powered with sufficient voltage (see specification below). Below the specified supply voltage, only voltages that are
close to VSS or VBAT can be switched.
When PBAna[x] is set to 1, one pad of the Port B terminals is changed from digital I/O mode to analog. The usage
of the registers RegPBPullup, RegPBOut and RegPBDir define the analog configuration (see Table 12-9).
When PBAna[x] = 1, then PBPullup[x] connects the pin to the analog bus. PBDir[x] and PBPOut[x] select which
of the 4 analog lines is used.
analog bus selection
PBDir[x]
PBout[x]
PBPullup[x]
PB[x] selection on
0
1
analog line 0
0
1
analog line 1
1
0
1
analog line 2
1
analog line 3
X
0
High impedance
Table 12-9: Selection of the analog lines with RegPBDir, RegPBout and RegPBPullup when PBAna[x] = 1
Example:
Set the pads PB[2] and PB[5] on the analog line 3. (the values X depend on the configuration of others
pads)
-
apply high impedance in the analog mode (move RegPBPullup,#0bXX0XX0XX)
-
go to analog mode (move RegPBAna,#0bXX1XX1XX)
-
select the analog line3 (move RegPBDir,#0bXX1XX1XX and move RegPBOut,#0bXX1XX1XX)
-
apply the analog line to the output (move RegPBPullup,#0bXX1XX1XX)
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XE8806ARI026LF 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Ultra Low-Power Low-Voltage
XE8807AMI000 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Ultra Low-Power Low-Voltage
XE8807AMI026LF 制造商:SEMTECH 制造商全称: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 类别:集成电路 (IC) >> 嵌入式 - 微控制器 - 特定应用 系列:XE880x 产品变化通告:Product Discontinuation 26/Aug/2009 标准包装:250 系列:- 应用:网络处理器 核心处理器:4Kc 程序存储器类型:- 控制器系列:- RAM 容量:16K x 8 接口:以太网,UART,USB 输入/输出数:- 电源电压:1.8V, 3.3V 工作温度:- 安装类型:表面贴装 封装/外壳:208-LQFP 包装:带卷 (TR) 供应商设备封装:PG-LQFP-208 其它名称:SP000314382