参数资料
型号: AT85C51SND3B1-7FTUL
厂商: Atmel
文件页数: 83/119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
66
AT85C51SND3B
7632D–MP3–01/07
Figure 31. Timer 0 and Timer 1 Clock Controller and Symbols
Timer 0
Timer 0 functions as either a Timer or event Counter in four modes of operation.
Figure 32, Figure 34, Figure 36, and Figure 38 show the logical configuration of each
mode.
Timer 0 is controlled by the four lower bits of TMOD register (see Table 82) and bits 0, 1,
4 and 5 of TCON register (see Table 81). TMOD register selects the method of Timer
gating (GATE0), Timer or Counter operation (C/T0#) and mode of operation (M10 and
M00) according to Table 78. TCON register provides Timer 0 control functions: overflow
flag (TF0), run control bit (TR0), interrupt flag (IE0) and interrupt type control bit (IT0).
For normal Timer operation (GATE0 = 0), setting TR0 allows TL0 to be incremented by
the selected input. Setting GATE0 and TR0 allows external pin INT0 to control Timer
operation.
Timer 0 overflow (count rolls over from all 1s to all 0s) sets TF0 flag generating an inter-
rupt request.
It is important to stop Timer/Counter before changing mode.
Table 78. Timer/counter 0 Operating Modes
Mode 0 (13-bit Timer)
Mode 0 configures Timer 0 as a 13-bit Timer which is set up as an 8-bit Timer (TH0 reg-
ister) with a modulo 32 prescaler implemented with the lower five bits of TL0 register
(see Figure 32). The upper three bits of TL0 register are indeterminate and should be
ignored. Prescaler overflow increments TH0 register. Figure 33 gives the overflow
period calculation formula.
PER
CLOCK
TIM0
CLOCK
OSC
CLOCK
0
1
T0X2
CKCON.1
Timer 0
Timer 0 Clock Symbol
PER
CLOCK
TIM1
CLOCK
OSC
CLOCK
0
1
T1X2
CKCON.2
÷ 2
Timer 1
Timer 1 Clock Symbol
Clock
÷ 2
M10
M00
Mode
Operation
0
8-bit Timer/Counter (TH0) with 5-bit prescaler (TL0).
0
1
16-bit Timer/Counter.
1
0
2
8-bit auto-reload Timer/Counter (TL0).
1
3
TL0 is an 8-bit Timer/Counter.
TH0 is an 8-bit Timer using Timer 1’s TR0 and TF0 bits.
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