參數(shù)資料
| 型號： | ATTINY13A-MMU |
| 廠商： | Atmel |
| 文件頁數(shù)： | 46/67頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MCU AVR 1K FLASH 20MHZ 10-DFN |
| 產品培訓模塊： | MCU Product Line Introduction tinyAVR Introduction |
| 標準包裝： | 490 |
| 系列： | AVR® ATtiny |
| 核心處理器： | AVR |
| 芯體尺寸： | 8-位 |
| 速度： | 20MHz |
| 外圍設備： | 欠壓檢測/復位，POR，PWM，WDT |
| 輸入/輸出數(shù)： | 6 |
| 程序存儲器容量： | 1KB（512 x 16） |
| 程序存儲器類型： | 閃存 |
| EEPROM 大?。?/td> | 64 x 8 |
| RAM 容量： | 64 x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 1.8 V ~ 5.5 V |
| 數(shù)據(jù)轉換器： | A/D 4x10b |
| 振蕩器型： | 內部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 10-VFDFN 裸露焊盤 |
| 包裝： | 托盤 |
| 產品目錄頁面： | 612 (CN2011-ZH PDF) |
| 配用： | ATSTK600-DIP40-ND - STK600 SOCKET/ADAPTER 40-PDIP ATAVRDRAGON-ND - KIT DRAGON FLASH MEM AVR ATAVRISP2-ND - PROGRAMMER AVR IN SYSTEM ATJTAGICE2-ND - AVR ON-CHIP D-BUG SYSTEM |
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27
8126F–AVR–05/12
ATtiny13A
6.3.1
Switching Time
When switching between prescaler settings, the System Clock Prescaler ensures that no
glitches occur in the clock system and that no intermediate frequency is higher than neither the
clock frequency corresponding to the previous setting, nor the clock frequency corresponding to
the new setting.
The ripple counter that implements the prescaler runs at the frequency of the undivided clock,
which may be faster than the CPU’s clock frequency. Hence, it is not possible to determine the
state of the prescaler – even if it were readable, and the exact time it takes to switch from one
clock division to another cannot be exactly predicted.
From the time the CLKPS values are written, it takes between T1 + T2 and T1 + 2*T2 before the
new clock frequency is active. In this interval, 2 active clock edges are produced. Here, T1 is the
previous clock period, and T2 is the period corresponding to the new prescaler setting.
6.4
Register Description
6.4.1
OSCCAL – Oscillator Calibration Register
Bit 7 – Res: Reserved Bit
This bit is reserved bit in ATtiny13A and it will always read zero.
Bits 6:0 – CAL[6:0]: Oscillator Calibration Value
Writing the calibration byte to this address will trim the internal Oscillator to remove process vari-
ations from the Oscillator frequency. This is done automatically during Chip Reset. When
OSCCAL is zero, the lowest available frequency is chosen. Writing non-zero values to this regis-
ter will increase the frequency of the internal Oscillator. Writing 0x7F to the register gives the
highest available frequency.
The calibrated Oscillator is used to time EEPROM and Flash access. If EEPROM or Flash is
written, do not calibrate to more than 10% above the nominal frequency. Otherwise, the
EEPROM or Flash write may fail. Note that the Oscillator is intended for calibration to 9.6 MHz or
4.8 MHz. Tuning to other values is not guaranteed, as indicated in Table 6-7 below.
To ensure stable operation of the MCU the calibration value should be changed in small steps. A
variation in frequency of more than 2% from one cycle to the next can lead to unpredicatble
behavior. Changes in OSCCAL should not exceed 0x20 for each calibration. It is required to
ensure that the MCU is kept in Reset during such changes in the clock frequency
Bit
765
4321
0
–
CAL6
CAL5
CAL4
CAL3
CAL2
CAL1
CAL0
OSCCAL
Read/Write
R
R/W
Initial Value
0
Device Specific Calibration Value
Table 6-7.
Internal RC Oscillator Frequency Range
OSCCAL Value
Typical Lowest Frequency
with Respect to Nominal Frequency
Typical Highest Frequency
with Respect to Nominal Frequency
0x00
50%
100%
0x3F
75%
150%
0x7F
100%
200%
相關PDF資料 |
PDF描述 |
|---|---|
| HSHM-GUIDE-PIN-1 | CONN HSHM GUIDE PIN M4-.7-6G |
| ATTINY13A-SU | IC MCU AVR 1K FLASH 20MHZ 8SOIC |
| ATTINY13A-PU | IC MCU AVR 1K FLASH 20MHZ 8PDIP |
| ATTINY48-MUR | MCU AVR 4KB FLASH 12MHZ 32QFN |
| ATTINY13A-MU | IC MCU AVR 1K FLASH 20MHZ 20-QFN |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ATTINY13A-MMU SL371 | 制造商:Atmel Corporation 功能描述:MCU 8BIT ATTINY RISC 1KB FLASH 2.5V/3.3V/5V 10PIN MLF - Trays |
| ATTINY13A-MMU SL383 | 制造商:Atmel Corporation 功能描述:AVR, 1KB FLASH, 64B EE, 64B SRAM - WQFN/MLF, IND TEMP, GREEN - Tape and Reel |
| ATTINY13A-MMUR | 功能描述:8位微控制器 -MCU AVR 1KB FLSH 64B EE 64B SRAM-20MHz, IND RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
| ATTINY13A-MU | 功能描述:8位微控制器 -MCU 1KB In-system Flash 20MHz 1.8V-5.5V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
| ATTINY13A-MUR | 功能描述:8位微控制器 -MCU AVR 1KB FLSH 64B EE 64B SRAM-20MHz, IND RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
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