參數(shù)資料
型號: AT85C51SND3B1-RTTUL
廠商: Atmel
文件頁數(shù): 22/119頁
文件大?。?/td> 0K
描述: IC DECODER/ENCODER DGTL 100-LQFP
標(biāo)準(zhǔn)包裝: 90
類型: 音頻編碼器/解碼器
應(yīng)用: 移動電話,手機(jī),視頻顯示器
電壓 - 電源,數(shù)字: 1.65 V ~ 3.6 V
安裝類型: 表面貼裝
封裝/外殼: 100-LQFP
供應(yīng)商設(shè)備封裝: 100-LQFP(14x14)
包裝: 托盤
118
AT85C51SND3B
7632D–MP3–01/07
Reset Value = 0000 0000b
USB Device Endpoint
Registers
Reset Value = 0000 0000b
Bit
Number
Bit
Mnemonic Description
7-0
FNUM7:0
Frame Number Lower Flag
Set by hardware. These bits are the 8 LSB of the 11-bits Frame Number
information.
Table 118. UDMFN Register
UDMFN (1.DEh) – USB Device Frame Number Register
7
6
5
4
3
2
1
0
-
FNCERR
-
MFNUM2:0
Bit
Number
Bit
Mnemonic Description
7-5
-
Reserved
The value read from these bits is always 0. Do not set these bits.
4
FNCERR
Frame Number CRC Error Flag
Set by hardware when a corrupted Frame Number in start of frame packet is
received.
This bit and the SOFI interrupt are updated at the same time.
3
-
Reserved
The value read from this bit is always 0. Do not set this bit.
2-0
MFNUM2:0
Micro-Frame Number Flag
Number of micro-frames (0 to 7) received in one frame. MFNUM is reset at the
beginning of each new frame (every 1 ms).
Table 119. UENUM Register
UENUM (1.C9h) – USB Endpoint Number Selection Register
7
6
5
4
3
2
1
0
-
EPNUM2
EPNUM1
EPNUM0
Bit
Number
Bit
Mnemonic Description
7-3
-
Reserved
The value read from these bits is always 0. Do not set these bits.
2-0
EPNUM2:0
Endpoint Number Bits
Set to select the number of the endpoint which shall be accessed by the CPU or
by the DFC depending on UPNUMS bit in UECONX. See Section “Endpoint
Selection” for more details.
EPNUM = 111b is forbidden.
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