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參數(shù)資料
| 型號： | CM109 |
| 廠商： | C-Media Electronics Inc. |
| 英文描述： | USB I/O Controller |
| 中文描述： | 的USB I / O控制器 |
| 文件頁數(shù)： | 21/36頁 |
| 文件大?。?/td> | 618K |
| 代理商： | CM109 |
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CM109
High Integration / Low Cost USB Audio Controller
for PC Internet Phone
Date: 08/Sep/2005
Version:
1.3a
- 27 -
The figure below shows typical transactions between MCU and CM109.
After a
START, MCU should send 7-bit slave address (0111000) first, and then the 8th bit
denotes a read transfer when it’s high; or a write transfer when it’s low.
MCU write:
S
0x70
0
0x00
0
Byte 0 0
Byte 1 0
Byte 2 0
Byte 3
0
P
MCU read:
S
0x70
0
0x04
0
S
0x71
0
Byte 0 0
Byte 1 0
Byte 2 0
Byte 3 1
P
From CM109 to MCU
From MCU to CM109
S
START condition
P
STOP condition
0
Positive acknowledge
1
Negative acknowledge
Byte n
One byte data (address n)
In a write transfer, MCU keeps acting as the transmitter.
CM109 regards the first
DATA byte as start register address (it’s better to be 0x00).
The following four DATA
bytes are the content that MCU writes to the register addresses. In a read transfer,
two transactions are necessary.
MCU resets start register address by the first
transaction.
Then MCU changes to be the receiver during the second transaction to
get four bytes of data.
Note 1: Bits 0~3 of the first HID byte always reflect button activity, so they can not be
written by MCU.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CM1408-08DE | 8 FUNCTIONS, 2.5 V, DATA LINE FILTER |
| CM1482-02DE | 2 FUNCTIONS, DATA LINE FILTER |
| CM1608F100KE | 1 ELEMENT, 10 uH, FERRITE-CORE, GENERAL PURPOSE INDUCTOR, SMD |
| CM1608F100MT | 1 ELEMENT, 10 uH, FERRITE-CORE, GENERAL PURPOSE INDUCTOR, SMD |
| CM1608F1R5ME | 1 ELEMENT, 1.5 uH, FERRITE-CORE, GENERAL PURPOSE INDUCTOR, SMD |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CM10900 | 制造商:Edwards Signaling & Security Systems 功能描述:PIPE (3/4 INCH NOMINAL BORE |
| CM10902 | 制造商:Edwards Signaling & Security Systems 功能描述:3/4" ABS TO 22mm TUBE ADAPT. |
| CM10905 | 制造商:Edwards Signaling & Security Systems 功能描述:45 DEG ELBOW |
| CM10906 | 制造商:Edwards Signaling & Security Systems 功能描述:90 DEG BEND |
| CM10913 | 制造商:Edwards Signaling & Security Systems 功能描述:BULKHEAD SAMPLING POINT |
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