參數(shù)資料
型號: XE8805AMI028LF
廠商: Semtech
文件頁數(shù): 26/156頁
文件大小: 0K
描述: IC DAS 16BIT FLASH 8K MTP 64LQFP
標準包裝: 160
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: 64-LQFP
包裝: 托盤
供應商設備封裝: 64-LQFP(10x10)
產(chǎn)品目錄頁面: 585 (CN2011-ZH PDF)
配用: XE8000MP-ND - PROG BOARD AND PROSTART2 CARD
Semtech 2006
www.semtech.com
17-2
XE8805/05A
17.1
Features
Generates a voltage that is higher or equal to the supply voltage.
Can be easily enabled or disabled
17.2
Overview
The Vmult block generates a voltage (called “Vmult”) that is higher or equal to the supply voltage. This output
voltage is used in the acquisition chain.
The voltage multiplier should be on (bit ENABLE in RegVmultCfg0) when using the acquisition chain or analog
properties of the Port B while VBAT is below 3V. If the multiplier is enabled, the external capacitor on the pin
VMULT is mandatory.
The source clock of Vmult is selected by FIN[1:0] in RegVmultCfg0. It is strongly recommended to use the same
settings as in the ADC.
17.3
Control register
There is only one register in the Vmult. Table 177-1 describes the bits in the register.
Pos.
RegVmultCfg0
rw
Reset
Function
2
Enable
rw
0
resetsystem
enable of the vmult
‘1’ : enabled
‘0’ : disabled
1-0
Fin
rw
0
resetsystem
system clock division factor
‘00’ : 1/2,
‘01’ : 1/4,
‘10’ : 1/16,
‘11’ : 1/64
Table 177-1. RegVmultCfg0
17.4
External component
When the multiplier is enabled, a capacitor has to be connected to the VMULT pin. If the multiplier is disabled, the
pin may remain floating.
Min.
Max.
Note
Capacitor on VMULT
1.0
3.0
nF
Not
Recommended
for
New
Designs
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