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參數(shù)資料
| 型號： | HT82A821R |
| 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(shù)： | 17/39頁 |
| 文件大?。?/td> | 275K |
| 代理商： | HT82A821R |
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HT82A821R
Rev. 1.10
17
June 29, 2007
There is a system clock control register implemented to select the clock used in the MCU. This register consists of USB
clock control bit (USBCKEN), second suspend mode control bit (SUSP2) and system clock selection (SYSCLK)
And to define which endpoint FIFO is select by EPS2, EPS1 and EPS0.
Bit No.
Label
R/W
Reset
Functions
0~2
EPS0~EPS2
R/W
0
Accessing endpoint FIFO selection, EPS2, EPS1, EPS0:
000: Select endpoint 0 FIFO
001: Select endpoint 1 FIFO
010: Select endpoint 2 FIFO
011: reserved for future expansion, cannot be used
100: reserved for future expansion, cannot be used
101: reserved for future expansion, cannot be used
110: reserved for future expansion, cannot be used
111: reserved for future expansion, cannot be used
Iftheselectedendpointsarenotexisted,therelatedfunctionswillbe
absent.
3
USBCKEN
R/W
0
USB clock control bit. When this bit is set to 1 , it indicates that the
USB clock is enabled.
Otherwise, the USB clock is turned-off.
4
SUSP2
R/W
0
This bit is used for reducing power consumption in suspend mode.
In normal mode, clean this bit to 0
In HALT mode, set this bit to 1 for reducing power consumption.
5
f
SYS
24MHz
R/W
0
This bit is used to define the MCU system clock comes form external
OSC or system clock comes PLL output 24MHz clock.
0: system clock comes from OSC
1: system clock comes from PLL output 24MHz
6
SYSCLK
R/W
0
This bit is used to specify the system clock oscillator frequency used
by MCU.
Ifa6MHzcrystaloscillatororresonatorisused,thisbitshouldbeset
to 1 .
If a 12MHz crystal oscillator or resonator is used. this bit should be
cleared to 0 .
UCC (22H) Register
Note: Isochronous endpoint 2 is implemented by hardware, so FIFO2 can not read/write by firmware.
AWR register contains current address and a remote wake up function control bit. The initial value of AWR is 00H .
The address value extracted from the USB command has not to be loaded into this register until the SETUP stage be-
ing finished.
Bit No.
Label
R/W
Power-on
Functions
0
WKEN
R/W
0
USB remote-wake-up enable/disable (1/0)
1~7
AD0~AD6
R/W
0
USB device address
AWR (23H) Register
STALLregister shows where the corresponding endpoint works properly or not. As soon as the endpoint works improp-
erly, the related bit in the STALL has to be set to 1 . The STALL will be cleared by USB reset signal.
Bit No.
Label
R/W
Power-on
Functions
0~2
STL0~STL2
R/W
0
Set by users when related USB endpoints were stalled. They are
cleared by USB reset and Setup Token event.
3~7
STL3~STL7
0
Undefined bit, read as 0 .
STALL (24H) Register
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HT82A821R_07 | USB Audio MCU |
| HT82A822R | USB Audio MCU |
| HT82A822R_07 | USB Audio MCU |
| HT82A832R | Basic USB Phone OTP MCU |
| HT82A850R | Audio MCU |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HT82A821R_07 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:USB Audio MCU |
| HT82A822R | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:USB Audio MCU |
| HT82A822R_07 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:USB Audio MCU |
| HT82A824R | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:USB Audio MCU |
| HT82A832R | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:USB Audio MCU |
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