参数资料
型号: AT85C51SND3B1-7FTUL
厂商: Atmel
文件页数: 44/119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
30
AT85C51SND3B
7632D–MP3–01/07
Figure 18. PLL Block Diagram and Symbol
Table 24. PLL Reverse Clock Selection
PLL Programming
The PLL is programmed depending on the oscillator clock frequency. In order to mini-
mize the output jitter, FREV must be as higher as possible. Table 26 shows the PLL
programming values and reverse frequency depending on some oscillator frequency.
Table 25. PLL Programming Values versus Input Frequency
System Clock Generator
In order to increase the system computation throughput, it is possible to switch the sys-
tem clock to higher value when PLL is enabled. System clock generator block diagram
is shown in Figure 19 and is based on a frequency selector controlled by SYSCKS1:0
bits in CKSEL (see Table 34) according to Table 26.
The CPU clock can be disabled by entering the idle reduction mode as detailed in the
Section “Power Management”, page 19.
Note:
In order to prevent any incorrect operation while dynamically switching the system fre-
quency, user must be aware that all peripherals using the peripheral clock as time
reference (timers, etc…) will have their time reference modified by this frequency
change.
PLLCKS1:0
Clock Selection (FREV)
00
12 MHz (default)
01
16 MHz
10
20 MHz
11
12 MHz
÷ (PLLR + 1)
PLLCKS1:0
CKSEL.4:3
PLLN3:0
PLLCLK.3:0
PLL Clock Symbol
Up
Down
CHP
N Divider
VCO
PLL
CLOCK
480 MHz
00
01
10
11
PLLR3:0
PLLCLK.7:4
R Divider
Primary
Divider
12 MHz
16 MHz
20 MHz
PFLD
F
REV
FOSC (MHz)
PLLCKS1:0
PLLN3:0 / N
PLLR3:0 / R
FREV (MHz)
12
00
0000
XXXX
12
13
11
1100 / 13
1011 / 12
1
16
01
0000
XXXX
16
19.2
11
0111 / 8
0100 / 5
2.4
19.5
11
1100 / 13
0111 / 8
1.5
20
10
0000
XXXX
20
24
00
0001 / 2
XXXX
12
26
11
1100 / 13
0101 / 6
2
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