参数资料
型号: ATTINY24A-CCUR
厂商: Atmel
文件页数: 132/135页
文件大小: 0K
描述: MCU AVR 2KB FLASH 20MHZ 15UFBGA
产品培训模块: MCU Product Line Introduction
tinyAVR Introduction
标准包装: 1
系列: AVR® ATtiny
核心处理器: AVR
芯体尺寸: 8-位
速度: 20MHz
连通性: USI
外围设备: 欠压检测/复位,POR,PWM,温度传感器,WDT
输入/输出数: 12
程序存储器容量: 2KB(1K x 16)
程序存储器类型: 闪存
EEPROM 大小: 128 x 8
RAM 容量: 128 x 8
电压 - 电源 (Vcc/Vdd): 1.8 V ~ 5.5 V
数据转换器: A/D 8x10b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 15-UFBGA
包装: 标准包装
其它名称: ATTINY24A-CCURDKR
96
32015G–AVR32–09/09
AT32AP7001
11.5.3.2
Lock suppression
When using high division or multiplication factors, there is a possibility that the PLL can give
false lock indications while sweeping to the correct frequency. To prevent false lock indications
from setting the LOCKn flag, the lock indication can be suppressed for a number of slow clock
cycles indicated in the PLLn:COUNT field. Typical start-up times can be found using the Atmel
filter caluclator (see below).
11.5.3.3
Operating range selection
To use PLLn, a passive RC filter should be connected to the LFTn pin, as shown in Figure 11-2.
Filter values depend on the PLL reference and output frequency range. Atmel provides a tool
named “Atmel PLL LFT Filter Calculator AT91”. The PLL for AT32AP7001 can be selected in
this tool by selecting “AT91RM9200 (58A07F)” and leave “Icp = ‘1’” (default).
11.5.4
Synchronous clocks
Oscillator 0 (default) or PLL0 provides the source for the main clocks, which is the common root
for the synchronous clocks for the CPU, and HSB, PBA, and PBB modules. The main clock is
divided by an 8-bit prescaler, and each of these four synchronous clocks can run from any tap-
ping of this prescaler, or the undivided main clock, as long as f
CPU
f
HSB
f
PBx and fPBB=fHSB.
The synchronous clock source can be changed on-the fly, responding to varying load in the
application. The clock domains can be shut down in sleep mode, as described in ”Sleep modes”
on page 99. Additionally, the clocks for each module in the four domains can be individually
masked, to avoid power consumption in inactive modules.
Figure 11-3. Synchronous clock generation
Mask
Prescaler
0
1
Osc0 clock
PLL0 clock
PLLSEL
0
1
CPUSEL
CPUDIV
Main clock
Sleep
Controller
CPUMASK
CPU clocks
HSB clocks
PBAclocks
PBB clocks
Sleep
instruction
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ATTINY24A-MFR 功能描述:8位微控制器 -MCU AVR 2KB FLSH 128B EE USI ADC 20MHz,125C RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
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