亚洲日本一线产区二线产区,亚洲AV无码AV制服丝袜在线,91国内精品久久久久影院优播

您好，
買賣IC網(wǎng)歡迎您。
請登錄
免費注冊

您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄69009 > M30240M5-XXXFP 16-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP80 PDF資料下載

參數(shù)資料

型號：	M30240M5-XXXFP
元件分類：	微控制器/微處理器
英文描述：	16-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP80
封裝：	0.80 MM PITCH, PLASTIC, QFP-80
文件頁數(shù)：	86/139頁
文件大小：	1453K
代理商：	M30240M5-XXXFP

第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁當(dāng)前第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁第131頁第132頁第133頁第134頁第135頁第136頁第137頁第138頁第139頁

Mitsubishi microcomputers

M30240 Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Specifications REV. G

Specifications in this manual are tentative and subject to change

Universal Serial Bus

Figure 1.35: USB Interrupt Status Register 2

1.5.0.0.1 Clearing USB Interrupt Status Registers

The USB Interrupt Status Register 1 and 2 are used to indicate pending interrupts for a given source.

The USB FCU sets the interrupt status bits. The CPU writes a “1” to each status bit to clear it.

Because the USB Function Interrupt has multiple sources that can generate an interrupt, it is recom-

mended that the user first read the two status registers and store them in variables then write back the

same value for clearing all the existing interrupts that were pending when the status registers were read.

This procedure prevents any interrupt that occurs after the status registers are read from being cleared

by the ‘write-back’ operation. The CPU must read, then write both status registers, writing to status reg-

ister 1 first and status register 2 second to guarantee proper operation. The upper three bits of the value

written back to USBIS2 should always be “000” to prevent any of the USB Reset, Suspend and Resume

Status Flags from being cleared.

The USB Reset, Suspend and Resume Status Flags are contained in USBIS2 along with the USB End-

point 4 In/Out Interrupt Status Flags and the USB Overrun/Underrun Interrupts Status Flag. Because the

flags are not all sources for the same interrupt, use caution when clearing one or more of the flags to

avoid inadvertently clearing other flags. The Reset, Suspend and Resume Status Flags should be

cleared individually by writing a byte value with at “1” only at the position corresponding to the flag to be

cleared. The USB Endpoint 4 In/Out Interrupt status Flags and the USB Overrun/Underrun Interrupt Sta-

tus Flag should be cleared as described in the preceding paragraph because they are sourced for the

USB Function Interrupt.

“Read-modify-write” instructions, such as “BCLR” and “BSET”, should not be used to clear any of the

interrupt status bits in USBIS1 or USBIS2. Using these instructions could cause pending interrupts to be

cleared without the firmware’s knowledge.

USB Interrupt Status Register 2

Symbol

Address

When reset

USBIS2

030316

0016

Bit name

Bit symbol

Function

Reserved

Must always be set to "0"

INTST8

INTST9

USB Endpoint 4 IN

Interrupt Status Flag

USB Endpoint 4 OUT

Interrupt Status Flag

USB Overrun/Underrun

Interrupt Status Flag

USB Reset

Interrupt Status Flag

USB Resume Signaling

Interrupt Status Flag

USB Suspend Signaling

Interrupt Status Flag