欧美成人免费电影,国产欧美一区二区三区精品酒店,精品国产a毛片,色网在线免费观看

參數資料
型號: HT82A851R
廠商: Holtek Semiconductor Inc.
英文描述: USB Audio MCU
中文描述: USB音頻控制器
文件頁數: 9/43頁
文件大小: 304K
代理商: HT82A851R
HT82A851R
Rev. 1.20
9
June 15, 2007
interrupt requests may occur during this interval but only
the interrupt request flag is recorded. If a certain
interrupt requires servicing within the service routine,
the EMI bit and the corresponding bit of the INTC0 or
INTC1 may be set to allow interrupt nesting. If the stack
is full, the interrupt request will not be acknowledged,
even if the related interrupt is enabled, until the stack
pointer is decremented. If immediate service is desired,
the stack must be prevented from becoming full.
All these kinds of interrupts have a wake-up capability.
As an interrupt is serviced, a control transfer occurs by
pushing the program counter onto the stack, followed by
a branch to a subroutine at specified location in the
program memory. Only the program counter is pushed
onto the stack. If the contents of the register or status
register (STATUS) are altered by the interrupt service
program which corrupts the desired control sequence,
the contents should be saved in advance.
The
USB
interrupts are triggered by the following
USB
events and the related interrupt request flag (USBF; bit
4 of the INTC0) will be set.
Accessing the corresponding
USB
FIFO from the PC
The
USB
suspend signal from the PC
The
USB
resume signal from the PC
USB Reset signal
When the interrupt is enabled, the stack is not full and
the USB interrupt is active, a subroutine call to location
04H will occur. The interrupt request flag (USBF) and
EMI bits will be cleared to disable other interrupts.
When the PC Host accesses the FIFO of the
HT82A851R, the corresponding request bit of the USR
is set, and a USB interrupt is triggered. So the user can
easily determine which FIFO has been accessed. When
the interrupt has been served, the corresponding bit
should be cleared by firmware. When the HT82A851R
receives a USB Suspend signal from the Host PC, the
suspend line (bit0 of USC) of the HT82A851R is set and
a USB interrupt is also triggered.
Also when the HT82A851R receives a Resume signal
from the Host PC, the resume line (bit3 of USC) of the
HT82A851R is set and a USB interrupt is triggered.
The internal Timer/Event Counter 0 interrupt is
initialized by setting the Timer/Event Counter 0 interrupt
request flag (bit 5 of INTC0), caused by a timer 0
overflow. When the interrupt is enabled, the stack is not
full and the T0F bit is set, a subroutine call to location
08H will occur. The related interrupt request flag (T0F)
will be reset and the EMI bit cleared to disable further
interrupts.
Bit No.
Label
Function
0
EMI
Controls the master (global) interrupt (1=enable; 0=disable)
1
EUI
Controls the USB interrupt (1=enable; 0=disable)
2
ET0I
Controls the Timer/Event Counter 0 interrupt (1=enable; 0=disable)
3
ET1I
Controls the Timer/Event Counter 1 interrupt (1=enable; 0=disable)
4
USBF
USB interrupt request flag (1=active; 0=inactive)
5
T0F
Internal Timer/Event Counter 0 request flag (1=active; 0=inactive)
6
T1F
Internal Timer/Event Counter 1 request flag (1=active; 0=inactive)
7
Unused bit, read as 0
INTC0 (0BH) Register
Bit No.
Label
Function
0
EPLAYI
Play interrupt (1=enable; 0=disable)
1
ESII
Control Serial interface interrupt (1=enable; 0=disable)
2
RECI
Record interrupt (1=enable; 0=disable)
3, 7
Unused bit, read as 0
4
PLAYF
Play interrupt request flag (1=active; 0=inactive)
5
SIF
Serial interface interrupt request flag (1=active; 0=inactive)
6
RECF
Record interrupt request flag (1=active; 0=inactive)
INTC1 (1EH) Register
相關PDF資料
PDF描述
HT82J30A 16 Channel A/D MCU with SPI Interface
HT82J30R 16 Channel A/D MCU with SPI Interface
HT82J927A USB Gamepad
HT82J97E USB Joystick Encoder 8-Bit OTP MCU
HT82J97E-20SOP-A USB Joystick Encoder 8-Bit OTP MCU
相關代理商/技術參數
參數描述
HT82B40A 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:I/O MCU with USB Interface
HT82B40R 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:I/O MCU with USB Interface
HT82B40R_11 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:I/O MCU with USB Interface
HT82B42R 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:I/O MCU with USB Interface
HT82B42RE 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:I/O MCU with USB Interface
主站蜘蛛池模板: 湛江市| 宁乡县| 安岳县| 乐陵市| 广灵县| 商水县| 兰考县| 开封县| 志丹县| 大邑县| 静安区| 万荣县| 西吉县| 丹棱县| 集安市| 秀山| 浙江省| 天水市| 邯郸县| 孟州市| 乐清市| 祥云县| 马鞍山市| 溆浦县| 当雄县| 华蓥市| 栖霞市| 湖南省| 乐安县| 武平县| 稷山县| 航空| 碌曲县| 砚山县| 蒙阴县| 棋牌| 虞城县| 葫芦岛市| 印江| 乐业县| 江源县|