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): 109/164頁
文件大?。?/td> 1165K
代理商: MC68HC705JJ7CDW
MC68HC705JJ7 MC68HC705JP7 Advance Information Data Sheet, Rev. 4.1
Freescale Semiconductor
49
Chapter 6
Operating Modes
6.1 Introduction
This section describes the operation of the device with respect to the oscillator source and the low-power
modes:
Stop mode
Wait mode
Halt mode
Data-retention mode
6.2 Oscillator Source
The microcontroller unit (MCU) can be clocked by either an internal low-power oscillator (LPO) without
external components or by an external pin oscillator (EPO) which uses external components. The enable
and selection of the clock source is determined by the state of the oscillator select bits (OM1 and OM2)
in the interrupt status and control register (ISCR) as shown in Figure 6-1.
IRQE — External Interrupt Request Enable Bit
This read/write bit enables external interrupts. Refer to Chapter 4 Interrupts for more details.
OM1 and OM2 — Oscillator Select Bits
These bits control the selection and enabling of the oscillator source for the MCU. One choice is the
internal LPO and the other oscillator is the EPO which is common to most M68HC05 MCU devices.
The EPO uses external components like filter capacitors and a crystal or ceramic resonator and
consumes more power than the LPO. The selection and enable conditions for these two oscillators are
shown in Table 6-1. Reset clears OM1 and sets OM2, which selects the LPO and disables the EPO.
Therefore, the lowest power is consumed when OM1 is cleared. The state with both OM1 and OM2
set is provided so that the EPO can be started up and allowed to stabilize while the LPO still clocks the
MCU.
Address:
$000D
Bit 7
654321
Bit 0
Read:
IRQE
OM2
OM1
0
IRQF
000
Write:
R
IRQR
Reset:
11000000
= Unimplemented
R
= Reserved
Figure 6-1. IRQ Status and Control Register (ISCR)
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
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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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:
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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