收藏本站
Si4313-B1
Another available feature for the microcontroller clock is the clock tail, clkt[1:0] in Register 0Ah. Microcontroller
Output Clock. If the low frequency clock feature is not enabled (enlfc = 0), the system clock to the microcontroller is
disabled in SLEEP mode. However, it may be useful to provide a few extra cycles for the microcontroller to
complete its operation prior to the shutdown of the system clock signal. Setting the clkt[1:0] field will provide
additional cycles of the system clock before it shuts off.
clkt[1:0]
00
01
10
11
Clock Frequency
0 cycles
128 cycles
256 cycles
512 cycles
If an interrupt is triggered, the microcontroller clock will remain enabled regardless of the selected mode. As soon
as the interrupt is read, the state machine will move to the selected mode. For instance, if the chip is commanded
to SLEEP mode but an interrupt has occurred, the 30 MHz crystal will be disabled until the interrupt has been
cleared.
8.3. Low Battery Detector
A low battery detector (LBD) with digital readout is integrated into the chip. A digital threshold may be programmed
into the lbdt[4:0] field in "Register 1Ah. Low Battery Detector Threshold". When the digitized battery voltage
reaches this threshold, an interrupt will be generated on the nIRQ pin to the microcontroller. The microcontroller will
then confirm the interrupt source by reading "Register 03h. Interrupt/Status 1" and "Register 04h. Interrupt/Status
2."
If the LBD is enabled while the chip is in SLEEP mode, it will automatically enable the RC oscillator, which
periodically turns on the LBD circuit to measure the battery voltage. The battery voltage may also be read out
through "Register 1Bh. Battery Voltage Level" at any time when the LBD is enabled. The low battery detect function
is enabled by setting enlbd = 1 in "Register 07h. Operating Mode and Function Control 1".
Add
R/W
Func/
D7
D6
D5
D4
D3
D2
D1
D0
POR Def
Description
1A
R/W
Low Battery Detector
Threshold
lbdt[4] lbdt[3] lbdt[2] lbdt[1]
lbdt[0]
14h
1B
R
Battery Voltage Level
0
0
0
vbat[4] vbat[3] vbat[2] vbat[1] vbat[0]
—
The LBD output is digitized by a 5-bit ADC. When the LBD function is enabled (enlbd = 1 in "Register 07h.
Operating Mode and Function Control 1"), the battery voltage may be read at any time by reading "Register 1Bh.
Battery Voltage Level". A battery voltage threshold may be programmed in “Register 1Ah. Low Battery Detector
Threshold". When the battery voltage level drops below the battery voltage threshold, an interrupt is generated on
the nIRQ pin to the microcontroller if the LBD interrupt is enabled in "Register 06h. Interrupt Enable 2". The
microcontroller will then need to verify the interrupt by reading the interrupt status register, addresses 03 and 04h.
The LSB step size for the LBD ADC is 50 mV, with the ADC range demonstrated in Table 15. If the LBD is enabled,
the LBD and ADC will automatically be enabled every 1 s for approximately 250 μs to measure the voltage which
minimizes the current consumption in Sensor mode. Before an interrupt is activated, four consecutive readings are
required.
Battery Voltage = 1.7 + 50 mV ? ADC VALUE
34
Rev. 1.0
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
SI4320-J1-FT IC RCVR FSK 915MHZ 5.4V 16-TSSOP
SI4322-A0-FT IC RX FSK UNI 868/915MHZ 16TSSOP
SI4324DY-T1-GE3 MOSFET N-CH D-S 30V 8-SOIC
SI4330-B1-FM IC RCVR ISM 960MHZ 3.6V 20-QFN
SI4354DY-T1-GE3 MOSFET N-CH D-S 30V 8-SOIC
SI4355-B1A-FM IC EZRADIO FM RECEIVER SI4355
SI4388DY-T1-GE3 MOSFET DUAL N-CH 30V 8-SOIC
SI4390DY-T1-GE3 MOSFET N-CH 30V 8.5A 8SOIC
相关代理商/技术参数
SI4313-B1-FMR 功能描述:射频接收器 240-960 MHz Receiver RoHS:否 制造商:Skyworks Solutions, Inc. 类型:GPS Receiver 封装 / 箱体:QFN-24 工作频率:4.092 MHz 工作电源电压:3.3 V 封装:Reel
SI4315-A0-FT 功能描述:射频接收器 Receivers - IA4315 RoHS:否 制造商:Skyworks Solutions, Inc. 类型:GPS Receiver 封装 / 箱体:QFN-24 工作频率:4.092 MHz 工作电源电压:3.3 V 封装:Reel
SI4320DY 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:N-Channel 30-V (D-S) MOSFET
SI4320DY-T1 功能描述:MOSFET 30V 25A 1.6W RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube
SI4320DY-T1-E3 功能描述:MOSFET 30V 25A 3.5W 3.0mohm @ 10V RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube
SI4320DY-T1-GE3 功能描述:MOSFET 30V 25A 3.5W 3.0mohm @ 10V RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube
SI4320-J1-FT 功能描述:射频接收器 Receivers - IA4320 RoHS:否 制造商:Skyworks Solutions, Inc. 类型:GPS Receiver 封装 / 箱体:QFN-24 工作频率:4.092 MHz 工作电源电压:3.3 V 封装:Reel
SI4320-J1-FTR 功能描述:射频接收器 Receiver (EZRadio) RoHS:否 制造商:Skyworks Solutions, Inc. 类型:GPS Receiver 封装 / 箱体:QFN-24 工作频率:4.092 MHz 工作电源电压:3.3 V 封装:Reel