參數(shù)資料
型號(hào): MC68HC705SB7
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, PDSO28
封裝: SOIC-28
文件頁數(shù): 33/170頁
文件大小: 2161K
代理商: MC68HC705SB7
GENERAL RELEASE SPECIFICATION
August 27, 1998
MOTOROLA
ANALOG SUBSYSTEM
MC68HC05SB7
15-30
REV 2.1
15.7
CURRENT SOURCE FEATURES
The internal current source connected to the CAP pin supplies about 100
A of
current when the ramp discharge device is disabled and the current source is
active. Therefore this current source can be used in an application if the ISEN
enable bit is set to power up the current source is enabled by setting the A/D con-
version method to manual Mode 0 (ATD1 and ATD2 cleared) and the charge cur-
rent enabled (CHG set).
15.8
SAMPLE AND HOLD
When using the internal sample capacitor to capture a voltage for later conver-
sion, the HOLD and DHOLD bit must be cleared rst before changing any channel
selection. If both the HOLD (or DHOLD) bit and the channel selection are
changed on the same write cycle, the sample may be corrupted during the switch-
ing transitions.
NOTE
The sample capacitor can be affected by excessive noise created with respect to
the device’s VSS pin such that it may appear to leak down or charge up depending
on the voltage level stored on the sample capacitor. It is recommended to avoid
switching large currents through the port pins while a voltage is to remain stored
on the same capacitor.
The additional option of adding an offset voltage to the bottom of the sample
capacitor allows unknown voltages near VSS to be sampled and then shifted up
past the comparator offset and the device offset caused by a single VSS return pin.
The offset also provides a means to measure the internal VSS level regardless of
the comparator offset in order to determine NOFF as described in Section 15.5.
15.9
PORT B INTERACTION WITH ANALOG INPUTS
The analog subsystem is connected directly to the Port B I/O pins without any
intervening gates. It is therefore possible to measure the voltages on Port B pins
set as inputs; or to have the analog voltage measurements corrupted by Port B
pins set as outputs.
Table 15-8. Voltage Comparator Setup Conditions
Current
Source
Enable
Discharge
Device
Disable
Port B Pin
as Inputs
Prog. Timer
Input Capture
Source
ISEN = 0
DDRB4 = 0
DDRB5 = 0
ICEN = 0
相關(guān)PDF資料
PDF描述
MC68HC05SU3AB 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDIP42
MC68HC05T2P 8-BIT, MROM, MICROCONTROLLER, PDIP40
MC68HC08AS32CFN 8-BIT, EEPROM, 8.4 MHz, MICROCONTROLLER, PQCC52
MC68HC08AS32VFN 8-BIT, EEPROM, 8.4 MHz, MICROCONTROLLER, PQCC52
MC68HC08AS32FN 8-BIT, EEPROM, 8.4 MHz, MICROCONTROLLER, PQCC52
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC705SR3CP 功能描述:IC MCU 3.75K 2.1MHZ OTP 40-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(chǔ)器容量:64KB(64K x 8) 程序存儲(chǔ)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
MC68HC705SR3CPE 功能描述:8位微控制器 -MCU 8B MCU 192 BYTES RAM 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
MC68HC705SR3CPE 制造商:Freescale Semiconductor 功能描述:8-Bit Microcontroller IC
MC68HC705SR3PE 功能描述:IC MCU 3.75K 2.1MHZ OTP 40-DIP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:HC05 標(biāo)準(zhǔn)包裝:1 系列:AVR® ATmega 核心處理器:AVR 芯體尺寸:8-位 速度:16MHz 連通性:I²C,SPI,UART/USART 外圍設(shè)備:欠壓檢測/復(fù)位,POR,PWM,WDT 輸入/輸出數(shù):32 程序存儲(chǔ)器容量:32KB(16K x 16) 程序存儲(chǔ)器類型:閃存 EEPROM 大小:1K x 8 RAM 容量:2K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:44-TQFP 包裝:剪切帶 (CT) 其它名稱:ATMEGA324P-B15AZCT
MC68HC706P6ACDW 制造商:Motorola Inc 功能描述: