参数资料
型号: AT85C51SND3B1-7FTUL
厂商: Atmel
文件页数: 110/119页
文件大小: 0K
描述: IC DECODER/ENCODER DGTL 100CBGA
标准包装: 90
类型: 音频编码器/解码器
应用: 移动电话,手机,视频显示器
电压 - 电源,数字: 1.65 V ~ 3.6 V
安装类型: 表面贴装
封装/外壳: 100-TFBGA
供应商设备封装: 100-CTBGA(9x9)
包装: 托盘
90
AT85C51SND3B
7632D–MP3–01/07
When using this mode, there is no influence over the USB controller.
Memory Management
The controller only supports the following memory allocation management:
The reservation of a Pipe or an Endpoint can only be made in the growing order
(Pipe/Endpoint 0 to the last Pipe/Endpoint). The firmware shall thus configure them in
the same order.
The reservation of a Pipe or an Endpoint “ki” is done when its ALLOC bit is set. Then,
the hardware allocates the memory and insert it between the Pipe/Endpoints “ki-1” and
“ki+1”. The “ki+1” Pipe/Endpoint memory “slides” up and its data is lost. Note that the “ki+2
and upper Pipe/Endpoint memory does not slide.
Clearing a Pipe enable (PEN) or an Endpoint enable (EPEN) does not clear neither its
ALLOC bit, nor its configuration (EPSIZE/PSIZE, EPBK/PBK). To free its memory, the
firmware should clear ALLOC. Then, the “ki+1” Pipe/Endpoint memory automatically
“slides” down. Note that the “ki+2” and upper Pipe/Endpoint memory does not slide.
The following figure illustrates the allocation and reorganization of the USB memory in a
typical example:
Figure 54. Allocation and reorganization USB memory flow
Endpoint 0
Endpoint 1 to N
Unused
[DPADDH
DPADDL]
USB DPRAM
Free m em ory
0
1
2
3
4
5
EPEN=1
ALLOC=1
Free m em ory
0
1
2
4
5
EPEN=0
(ALLOC=1)
Free m em ory
0
1
2
4
5
Pipe/Endpoints
activation
Pipe/Endpoint
Disable
Free its m em ory
(ALLOC=0)
Free m em ory
0
1
2
3 (bigger size)
5
Pipe/Endpoint
Activatation
Lost m em ory
4
Conflict
相关PDF资料
PDF描述
JN1FS04FKK CONN PLUG 4POS R/A W/SOCKET SLD
AD1970JSTZRL IC ENCODER BTSC W/CODEC 48-LQFP
ADV7177KSZ IC DAC VIDEO NTSC 3-CH 44MQFP
VI-24L-CU-S CONVERTER MOD DC/DC 28V 200W
VI-24K-CU-S CONVERTER MOD DC/DC 40V 200W
相关代理商/技术参数
参数描述
AT85C51SND3B1N-DDV 功能描述:音频 DSP Microcontroller RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube
AT85C51SND3B1N-RTTUL 功能描述:音频 DSP Microcontroller RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube
AT85C51SND3B1-RTTUL 功能描述:音频 DSP MP3/WMA USB2.0 w/o DAC+DC/DC RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube
AT85C51SND3B2-RTTUL 功能描述:音频 DSP Microcontroller RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube
AT85C51SND3BX 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:MP3 Microcontrollers