参数资料
型号: XE8806AMI026TLF
厂商: Semtech
文件页数: 80/143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
7-2
XE8806A/XE8807A
7.1
Features
3 available clock sources (RC oscillator, quartz oscillator and external clock).
-
2 divider chains: high-prescaler (8 bits) and low-prescaler (15 bits).
-
CPU clock disabling in halt mode.
7.2
Overview
The XE88LCxx chips can work on different clock sources (RC oscillator, quartz oscillator and external clock). The
clock generator block is in charge of distributing the necessary clock frequencies to the circuit.
Figure 7-1 represents the functionality of the clock block.
The internal RC oscillator or an external clock source can be selected to drive the high prescaler. This prescaler
generates frequency divisions down to 1/256 of its input frequency. A 32kHz clock is generated by enabling the
quartz oscillator (if present in the product) or by selecting the appropriate tap on the high prescaler. The low
prescaler generates clock signals from 32kHz down to 1Hz. The clock source for the CPU can be selected from
the RC oscillator, the external clock or the 32kHz clock.
7.3
Register map
pos.
RegSysClock
rw
reset
function
7
CpuSel
r/w
0 nresetsleep
Select speed for cpuck
6
-
r
0
Unused
5
EnExtClock
r/w
0 nresetcold
Enable for external clock
4
BiasRc
r/w
1 nresetcold
Enable Rcbias (reduces start-up time of RC).
3
ColdXtal
r
1 nresetsleep
Xtal in start phase
2
-
r
0
Unused
1
EnableXtal
r/w
0 nresetsleep
Enable Xtal oscillator
0
EnableRc
r/w
1 nresetsleep
Enable RC oscillator
Table 7-1: RegSysClock register
pos.
RegSysMisc
rw
reset
function
7-2
--
r
000000
Unused
1
Output16k
r/w
0 nresetsleep
Output 16 kHz signal on PB[3]
0
OutputCpuCk
r/w
0 nresetsleep
Output CPU clock on PB[2]
Table 7-2: RegSysMisc register
pos.
RegSysPre0
rw
reset
function
7-1
--
r
0000000
Unused
0
ClearLowPrescal
w1
r0
0
Write 1 to reset low prescaler, but always
reads 0
Table 7-3: RegSysPre0 register
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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
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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