參數(shù)資料
型號(hào)： MAX1441GUP/V+
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 30/41頁(yè)
文件大?。?/td> 0K
描述： IC PROXMITY SENSOR 2CH 20-TSSOP
其它有關(guān)文件： Automotive Product Guide
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 74
類型： 觸控式傳感器
輸入類型： 數(shù)字
輸出類型： 數(shù)字
接口： JTAG，串行
電流 - 電源： 100µA
安裝類型： 表面貼裝
封裝/外殼： 20-TSSOP（0.173"，4.40mm 寬）
供應(yīng)商設(shè)備封裝： 20-TSSOP
包裝： 管件
MAX1441
Automotive, Two-Channel Proximity and
Touch Sensor
36
Watchdog Timer
The watchdog timer is clocked by the internal 32kHz
oscillator (Table 13). All timing reference for the watch-
dog is based on the 32kHz.
In addition, the watchdog is disabled in debug mode
and when SPE is set to 1. Clock to the watchdog is gated
off in the conditions mentioned in the Clock Sources
section.
Startup Timer
An independent startup timer (X-dog timer) functions:
Whenthedeviceisfirstpoweredup(POR)
Exitfromstopmode
The X-dog counter is used to count eight oscillator
cycles of the 5MHz after the power supply is stable.
The power supply is stable after three-to-four 32kHz
oscillator cycles.
The AFE circuit is released at least one 32kHz oscillator
cycle before the CPU to allow for the 5MHz clock startup
to properly occur.
The X-dog timer is active only for startup count; during
normal operation, it is completely shut off.
Idle Mode
The device supports idle mode. Idle mode suspends
the processor by holding the instruction pointer (IP) in a
static state. No instructions are fetched and no process-
ing occurs. Setting the IDLE bit in the SC register to logic
1 invokes the idle mode. The instruction that executes
this step is the last instruction prior to freezing the
program counter. Once in idle mode, all resources are
preserved and all clocks remain active with the enabled
peripherals. The power monitor continues to work, so the
processor can exit the idle state using any of the inter-
rupt sources that are enabled. The IDLE bit is cleared
automatically once the idle state is exited, allowing the
processor to execute the instruction that immediately
follows the instruction that sets the IDLE bit.
Resetting the processor also removes the idle mode.
Reset places the processor in a reset state and clears
the IDLE bit.
Stop Mode
The stop mode disables all circuits within the
processor, unless explicitly stated otherwise. All
microcontroller system clocks, timers, and serial
communication are stopped and no processing is pos-
sible. However, the AFE can be left in the standby mode
and remain functional.
Once in stop mode, the CPU is in a static state. Its power
consumption is mostly limited by the leakage current.
Stop mode is invoked by setting the STOP bit to logic 1.
The processor enters the stop mode on the instruction
that sets the STOP bit. Entering the stop mode does not
affect the setting of the clock control bits. This allows
the system to return to its original operating frequency
following the stop mode removal, except if the removal is
caused by RST or a power loss, which resets the clock
generation to its default condition.
The processor can exit stop mode by:
Anyoftheexternalinterruptsthatareenabled.
ExternalresetusingtheRSTpin.
Timerinterrupt.
Watchdogtimeout.
AFEinterruptsthatareenabled.
When the stop mode is removed, the device executes
the following procedure:
1) Remove clock gating of internal 5MHz.
2) Reset the warm-up counter.
3) Wait for Flash to power up (about 10Fs).
4) Allow the required warm-up delay of eight oscillator
cycles of the 5MHz input.
5) Resume normal operation.
During stop mode, the following peripherals can be
operational:
Timer(TMREN=1)
Watchdogtimer(WDCN.EWDI=1)
AFE
Reset Conditions
The device has four ways of entering a reset state:
Power-onreset
Watchdogtimerreset
Externalreset
Internalsystemreset
Table 13. Watchdog Timer Timeout Interval
WD[1:0]
TIMEOUT COUNT
TIMEOUT (s)
00
16384
0.5
01
32768
1.0
10
65536
2.0
11
131072
4.0
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1441IUP+ 功能描述:電容觸摸傳感器 RoHS:否 制造商:Microchip Technology 電源電壓: 通道數(shù)量: 封裝 / 箱體: 尺寸: 溫度范圍:
MAX1441IUP+T 功能描述:電容觸摸傳感器 RoHS:否 制造商:Microchip Technology 電源電壓: 通道數(shù)量: 封裝 / 箱體: 尺寸: 溫度范圍:
MAX1444EHJ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX1444EHJ/V+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC ANALOG TO DIGITAL CONVERTER RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX1444EHJ/V+T 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10-Bit 40Msps 3.0V Low-Power ADC with Internal Reference RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
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