参数资料
型号: MC68HC705JJ7S
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, UVPROM, 2.1 MHz, MICROCONTROLLER, CDIP20
封装: WINDOWED, CERAMIC, DIP-20
文件页数: 109/164页
文件大小: 1165K
代理商: MC68HC705JJ7S
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)
相关PDF资料
PDF描述
MC68HC705K1DWR2 8-BIT, OTPROM, MICROCONTROLLER, PDSO16
MC68HC705K1CP 8-BIT, OTPROM, MICROCONTROLLER, PDIP16
MC68HC705K1P 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PDIP16
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相关代理商/技术参数
参数描述
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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 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:HC05 其它有关文件:STM32F101T8 View All Specifications 特色产品:STM32 32-bit Cortex MCUs 标准包装:490 系列:STM32 F1 核心处理器:ARM? Cortex?-M3 芯体尺寸:32-位 速度:36MHz 连通性:I²C,IrDA,LIN,SPI,UART/USART 外围设备:DMA,PDR,POR,PVD,PWM,温度传感器,WDT 输入/输出数:26 程序存储器容量:64KB(64K x 8) 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:10K x 8 电压 - 电源 (Vcc/Vdd):2 V ~ 3.6 V 数据转换器:A/D 10x12b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:36-VFQFN,36-VFQFPN 包装:托盘 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... 其它名称:497-9032STM32F101T8U6-ND