參數(shù)資料
型號： MC68HC705JJ7CDW
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO20
封裝： SOIC-20
文件頁數(shù)： 137/164頁
文件大?。?/td> 1165K
代理商： MC68HC705JJ7CDW
Analog Subsystem
MC68HC705JJ7 MC68HC705JP7 Advance Information Data Sheet, Rev. 4.1
74
Freescale Semiconductor
During a reset, the HOLD bit is set and the DHOLD bit is cleared, which connects the internal sample
capacitor to the channel selection bus. And since a reset also clears the MUX[1:4] bits, then the
channel selection bus will be connected to VSS and the internal sample capacitor will be discharged to
VSS following the reset.
NOTE
When sampling a voltage for later conversion, the HOLD and DHOLD bits
should be cleared before making any changes in the MUX channel
selection. If the MUX channel and the HOLD/DHOLD are changed on the
same write cycle to the AMUX register, the sampled voltage may be altered
during the channel switching.
INV
This is a read/write bit that controls the relative polarity of the inherent input offset voltage of the voltage
comparators. This bit allows voltage comparisons to be made with both polarities and then averaged
together by taking the sum of the two readings and then dividing by 2 (logical shift right).
The polarity of the input offset is reversed by interchanging the internal voltage comparator inputs while
also inverting the comparator output. This interchange does not alter the action of the voltage
comparator output with respect to its port pins. That is, the output will only go high if the voltage on the
positive input (PB2 pin for comparator 1 and PB0 pin for comparator 2) is above the voltage on the
respective negative input (PB3 pin for comparator 1 and PB1 pin for comparator 2). This is shown
schematically in Figure 8-4. This bit is cleared by a reset of the device.
1 = The voltage comparators are internally inverted.
0 = The voltage comparators are not internally inverted.
NOTE
The effect of changing the state of the INV bit is to only change the polarity
of the input offset voltage. It does not change the output phase of the CPF1
or CPF2 flags with respect to the external port pins.
Table 8-1. Comparator 2 Input Sources
Case
HOLD
(AMUX)
DHOLD
(AMUX)
OPT
(MOR)
VOFF
(ASR)
Voltage
Offset
Source To Negative Input
of Comparator 2
Hold
sample
voltage
00
0
X(1)
1. Don’t care
No
Sample capacitor connected to
comparator 2 negative input; very low leakage
current.
10
11
Yes
Sample capacitor connected to comparator 2
negative input; bottom of capacitor offset from VSS
by approximately 100 mV, very low leakage current.
Divide input
0
1
X(1)
No
Signal on channel selection bus is divided
by 2 and connected to sample capacitor
and comparator 2 negative input
Direct input
1
0
X(1)
No
Signal on channel selection bus is connected
directly to sample capacitor and comparator 2
negative input.
Internal
temperature
diode
11
X(1)
No
Internal temperature sensing diode connected
directly to sample capacitor and comparator 2
negative input.
相關(guān)PDF資料
PDF描述
MC68HC705JJ7CP 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP20
MC68HC705JJ7S 8-BIT, UVPROM, 2.1 MHz, MICROCONTROLLER, CDIP20
MC68HC705K1DWR2 8-BIT, OTPROM, MICROCONTROLLER, PDSO16
MC68HC705K1CP 8-BIT, OTPROM, MICROCONTROLLER, PDIP16
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC705JP7CDW 功能描述:IC MCU 8BIT 28-SOIC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:HC05 其它有關(guān)文件:STM32F101T8 View All Specifications 特色產(chǎn)品:STM32 32-bit Cortex MCUs 標(biāo)準(zhǔn)包裝:490 系列:STM32 F1 核心處理器:ARM? Cortex?-M3 芯體尺寸:32-位 速度:36MHz 連通性:I²C，IrDA，LIN，SPI，UART/USART 外圍設(shè)備:DMA，PDR，POR，PVD，PWM，溫度傳感器，WDT 輸入/輸出數(shù):26 程序存儲器容量:64KB（64K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):2 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 10x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:36-VFQFN，36-VFQFPN 包裝:托盤 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名稱:497-9032STM32F101T8U6-ND
MC68HC705JP7CP 制造商:Rochester Electronics LLC 功能描述: 制造商:Freescale Semiconductor 功能描述:
MC68HC705K1CDW 制造商:Motorola Inc 功能描述:
MC68HC705KJ1CDW 功能描述:8位微控制器 -MCU 8 Bit 4MHz RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
MC68HC705KJ1CP 功能描述:IC MCU 4MHZ 1.2K OTP 16-DIP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:HC05 其它有關(guān)文件:STM32F101T8 View All Specifications 特色產(chǎn)品:STM32 32-bit Cortex MCUs 標(biāo)準(zhǔn)包裝:490 系列:STM32 F1 核心處理器:ARM? Cortex?-M3 芯體尺寸:32-位 速度:36MHz 連通性:I²C，IrDA，LIN，SPI，UART/USART 外圍設(shè)備:DMA，PDR，POR，PVD，PWM，溫度傳感器，WDT 輸入/輸出數(shù):26 程序存儲器容量:64KB（64K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):2 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 10x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:36-VFQFN，36-VFQFPN 包裝:托盤 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名稱:497-9032STM32F101T8U6-ND
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