參數(shù)資料
型號(hào): XE8801AMI027LF
廠商: Semtech
文件頁數(shù): 36/135頁
文件大?。?/td> 0K
描述: IC DAS 16BIT FLASH 8K MTP 44LQFP
標(biāo)準(zhǔn)包裝: 800
系列: XE880x
應(yīng)用: 感測(cè)機(jī)
核心處理器: Coolrisc816?
程序存儲(chǔ)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: 44-VFQFN 裸露焊盤
包裝: 托盤
供應(yīng)商設(shè)備封裝: 44-MLPQ(7x7)
產(chǎn)品目錄頁面: 585 (CN2011-ZH PDF)
配用: XE8000MP-ND - PROG BOARD AND PROSTART2 CARD
Semtech 2005
www.semtech.com
19-2
XE8801A – SX8801R
19.1 Features
Can be switched off, on or simultaneously with CPU activities
Generates an interrupt if power supply is below a pre-determined level
19.2 Overview
The Voltage Level Detector (VLD) monitors the state of the system battery. It returns a logical high value (an
interrupt) in the status register if the supplied voltage drops below the user defined level (Vsb).
The VLD must be calibrated by setting VldTune bits during product manufacturing to cancel technology variation.
19.3 Register map
There are two registers in the VLD, namely RegVldCtrl and RegVldStat. Table 19-1 shows the mapping of control
bits and functionality of RegVldCtrl while Table 19-2 describes that for RegVldStat.
pos.
RegVldCtrl
rw
reset
function
7-4
--
r
0000
reserved
3
VldRange
r w
0 resetsystem
VLD detection voltage range for VldTune = “011”:
0 : 1.3V (not used in XE8801A and SX8801R)
1 : 2.55V
2-0
VldTune[2:0]
r w
000
resetsystem
VLD tuning:
000 : +19 %
111 : -18 %
Table 19-1: RegVldCtrl
pos.
RegVldStat
rw
reset
function
7-3
--
r
00000
reserved
2
VldResult
r
0 resetsystem
is 1 when battery voltage is below the detection
voltage
1
VldValid
r
0 resetsystem
Indicates when VldResult can be read
0
VldEn
r w
0 resetsystem
VLD enable
Table 19-2: RegVldStat
19.4 Interrupt map
interrupt source
mapping in the interrupt manager
IrqVld
RegIrqMid(2)
Table 19-3: Interrupt map
19.5 VLD operation
The VLD is controlled by VldRange, VldTune and VldEn. VldRange selects the voltage range to be detected,
while VldTune is used to fine-tune this voltage level in 8 steps. VldEn is used to enable (disable) the VLD with a
1(0) value respectively.
When disabled, the block dissipates no power.
Not
Recommended
for
New
Designs
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