参数资料
| 型号： | SC900841JVKR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 165/192页 |
| 文件大小： | 0K |
| 描述： | IC POWER MGT 338-MAPBGA |
| 标准包装： | 2,000 |
| 应用： | PC，PDA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 338-TFBGA |
| 供应商设备封装： | 338-MAPBGA |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页第129页第130页第131页第132页第133页第134页第135页第136页第137页第138页第139页第140页第141页第142页第143页第144页第145页第146页第147页第148页第149页第150页第151页第152页第153页第154页第155页第156页第157页第158页第159页第160页第161页第162页第163页第164页当前第165页第166页第167页第168页第169页第170页第171页第172页第173页第174页第175页第176页第177页第178页第179页第180页第181页第182页第183页第184页第185页第186页第187页第188页第189页第190页第191页第192页
FUNCTIONAL DEVICE OPERATION
ADC SUBSYSTEM
coulomb counter is enabled, or in reset. Note that there is no
way to preset the CCOUT counter to an arbitrary value - only
to all zeros. Fuel gauging software must account for this reset
condition, which corresponds to a fully discharged battery.
The coulomb counter block also includes a dithering circuit
that can be enabled through the CCDITHER bit in the
CCCREG register, to reduce spurious tones in the frequency
spectrum of the coulomb count values. The circuit performs a
random dithering of the integration period by +/- one cycle of
the 32 kHz sampling clock. The dither signal is a pseudo-
random bit pattern generated by a linear feedback shift
register (LFSR).
For analog offset calibration, the coulomb counter block
includes an input that is driven by the CCCALA bit in the
CCCREG register. When this bit is set, the input terminals of
the ADC's integrator are shorted together, and the current
sense resistor is disconnected. The user may integrate for as
short or as long a period as desired, using any particular
value of ONEC, to determine the rate at which the integrator
is changing with zero input signal. From this, the DC offset
can be calculated and subtracted from future Coulomb count
values by the fuel gauging software.
The block also contains fault detection logic, which sets
the CCFAULT bit in the CCCREG register, if the CCOUT
counter overflows during charging - i.e., if the CCOUT count
exceeds the maximum positive 15-bit value (32767) and
causes a carry to the sign bit. This should not occur if the
ONEC value is set appropriately for the total mAh of the
battery (typically it is set to represent 1.0 C), due to the very
large dynamic range of the Coulomb counter. If, however, a
small ONEC value is set - representing much less than 1.0 C,
the CCOUT counter may not have enough dynamic range to
accommodate the total number of Coulombs of battery
capacity, and the CCFAULT bit will be set. Note that
CCFAULT does not cause an interrupt. It is simply a status bit
that may be read at any time by the system firmware.
The block also includes a CCINVERT bit in the CCCREG
register that allows the sense of coulomb counting to be
reversed, so that negative values represent charging and
positive values represent discharging.
ADC STATUS/CONTROL REGISTERS AND
BIT DESCRIPTION
Reference the Table 109 for read/write conditions and
default state for each of these registers
Table 109. ADC Interrupt/Mask Registers Structure and Bits Description
Name
RND
PENDET
OVERFLOW
Reserved
MRND
MPENDET
MOVERFLOW
Reserved
Bits
0
1
2
7:3
0
1
2
7:3
Description
ADCINT (ADDR 0x5F - R - Default Value: 0x00)
ADC Round Robin Cycle Completion Interrupt
x0 = Not Completed
x1 = Completed
Touch Screen Pen Detection Interrupt
x0 = Pen Not Detected
x1 = Pen Detected
Coulomb Counter reached 50% of it full scale value Interrupt
x0 = CC did not reach 50%
x1 = CC reached 50%
Reserved
MADCINT (ADDR 0x60 - R/W -Default Value: 0x00)
ADC Round Robin Cycle Completion Interrupt Mask
x0 = Unmask
x1 = Mask
Touch Screen Pen Detection Interrupt Mask
x0 = Unmask
x1 = Mask
Coulomb Counter reached 50% of it full scale value Interrupt Mask
x0 = Unmask
x1 = Mask
Reserved
900841
Analog Integrated Circuit Device Data
Freescale Semiconductor
165
相关PDF资料 |
PDF描述 |
|---|---|
| SC900AMLTRT | IC REG LDO ADJ .2A/.15A 20-MLPQ |
| SCCSP900842R2 | IC POWER MGT 36-WLCSP |
| SG1577ASY | IC REG CTRLR BST PWM VM 20-SOIC |
| SG1577DY | IC REG CTRLR BST PWM VM 20-DIP |
| SG3525ADW | IC REG CTRLR PWM VM 16-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SC900844JVK | 功能描述:PMIC 解决方案 PMUIC 5SW 14LDO 10BT ADC RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| SC900844JVKR2 | 功能描述:PMIC 解决方案 PMUIC 5SW 14LDO 10BT ADC RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| SC900A | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Programmable Penta ULDO with RESET and I2C Interface |
| SC900A100 | 制造商:Schneider Electric 功能描述:SUPERPROX ULTRASONIC PROXIMITY SENSOR 制造商:Schneider-Telemacanique 功能描述:SUPERPROX ULTRASONIC PROXIMITY SENSOR 制造商:SCHNEIDER ELECTRIC 功能描述:SUPERPROX ULTRASONIC PROXIMITY SENSOR |
| SC900A100FS | 制造商:Schneider Electric 功能描述:SUPERPROX ULTRASONIC PROXIMITY SENSOR 制造商:Schneider-Telemacanique 功能描述:SUPERPROX ULTRASONIC PROXIMITY SENSOR 制造商:SCHNEIDER ELECTRIC 功能描述:SUPERPROX ULTRASONIC PROXIMITY SENSOR |
发布紧急采购，3分钟左右您将得到回复。