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| 型號： | MC68HC705JB2DW |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, OTPROM, 3 MHz, MICROCONTROLLER, PDSO20 |
| 封裝： | SOIC-20 |
| 文件頁數(shù)： | 104/128頁 |
| 文件大小： | 2493K |
| 代理商： | MC68HC705JB2DW |
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August 28, 1998
GENERAL RELEASE SPECIFICATION
UNIVERSAL SERIAL BUS MODULE
REV 1.1
10-9
After a reset is removed, the device will be in the attached, but not yet addressed
or congured state (refer to Section 9.1 of the USB specication). The device must
be able to accept a device address via a SET_ADDRESS command (refer to
section 9.4 of the USB specication) no later than 10 ms after the reset is
removed.
Reset can wake a device from the suspended mode. A device may take up to
10ms to wake up from the suspended state.
10.2.3 Suspend
The MC68HC705JB2 supports suspend mode for low power. Suspend mode
should be entered when the USB data lines are in the idle state for more than 3.0
ms. Entry into Suspend mode is controlled by the SUSPND bit in the USB
Interrupt Register. Any low speed bus activity should keep the device out of the
suspend state. Low speed devices are kept awake by periodic low speed EOP
signals from the host. This is referred to as Low speed keep alive (refer to Section
11.2.5.1 of the USB specication).
Firmware should monitor the EOPF ag and enter suspend mode by setting the
SUSPND bit if an EOP is not detected for 3 ms.
Per the USB specication, the MC68HC705JB2 is required to draw less than
500
A from the V
DD supply when in the suspend state. This includes the current
supplied by the voltage regulator to the 15 K
to ground termination resistors
placed at the host end of the USB bus. This low current requirement means that
rmware is responsible for entering STOP mode once the USB module has been
placed in the suspend state.
10.2.4 Resume After Suspend
The MC68HC705JB2 can be activated from the suspend state by normal bus
activity, a USB reset signal, or by a forced resume driven from the
MC68HC705JB2.
10.2.4.1 Host Initiated Resume
The host signals resume by initiating resume signalling (“K” state) for at least 20
ms followed by a standard low speed EOP signal. This 20 ms ensures that all
devices in the USB network are awakened.
After resuming the bus, the host must begin sending bus trafc within 3 ms to
prevent the device from re-entering suspend mode.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC705JB4DW | 制造商:Motorola Inc 功能描述: 制造商:MOTOROLA 功能描述: |
| MC68HC705JJ7CDW | 功能描述:IC MCU 8BIT 20-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 標準包裝: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 |
| 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 標準包裝: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: |
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