- 您现在的位置：买卖IC网 > PDF目录134951 > Q80C32-30SHXXX:RD (TEMIC SEMICONDUCTORS) 8-BIT, 30 MHz, MICROCONTROLLER, CQFP44 PDF资料下载
参数资料
| 型号： | Q80C32-30SHXXX:RD |
| 厂商： | TEMIC SEMICONDUCTORS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, 30 MHz, MICROCONTROLLER, CQFP44 |
| 文件页数： | 34/83页 |
| 文件大小： | 8336K |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页当前第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页
31
8021G–AVR–03/11
ATmega329P/3290P
The capacitance (Ce + Ci) needed at each TOSC pin can be calculated by using:
where
Ce - is optional external capacitors as described in Figure 8-2 on page 29
Ci - is the pin capacitance in Table 8-7 on page 31
CL - is the load capacitance for a 32.768kHz crystal specified by the crystal vendor.
C
S - is the total stray capacitance for one TOSC pin.
Crystals specifying load capacitance (CL) higher than the ones given in the Table 8-6 on page
30, require external capacitors applied as described in Figure 8-2 on page 29.
To find suitable load capacitance for a 32.768kHz crystal, please consult the crystal datasheet.
The Low-frequency Crystal Oscillator must be selected by setting the CKSEL Fuses to “0110” or
“0111” as shown in Table 8-8. Start-up times are determined by the SUT Fuses as shown in
Note:
1. This option should only be used if frequency stability at start-up is not important for the
application
8.6
Calibrated Internal RC Oscillator
By default, the Internal RC Oscillator provides an approximate 8MHz clock. Though voltage and
temperature dependent, this clock can be very accurately calibrated by the user. The device is
shipped with the CKDIV8 Fuse programmed. See ”System Clock Prescaler” on page 33 for
more details.
This clock may be selected as the system clock by programming the CKSEL Fuses as shown in
Table 8-9 on page 32. If selected, it will operate with no external components. During reset,
hardware loads the pre-programmed calibration value into the OSCCAL Register and thereby
automatically calibrates the RC Oscillator. The accuracy of this calibration is shown as Factory
calibration in Table 28-4 on page 335.
By changing the OSCCAL register from SW, see ”OSCCAL – Oscillator Calibration Register” on
page 35, it is possible to get a higher calibration accuracy than by using the factory calibration.
The accuracy of this calibration is shown as User calibration in Table 28-4 on page 335.
Table 8-7.
Start-up Times for the Low-frequency Crystal Oscillator Clock Selection
SUT1..0
Additional Delay from Reset (V
CC = 5.0V)
Recommended Usage
00
4 CK
Fast rising power or BOD enabled
01
4 CK + 4.1ms
Slowly rising power
10
4 CK + 65ms
Stable frequency at start-up
11
Reserved
Table 8-8.
Start-up Times for the Low-frequency Crystal Oscillator Clock Selection
CKSEL3...
0
Start-up Time from
Power-down and Power-save
Recommended Usage
0110(1)
1K CK
0111
32K CK
Stable frequency at start-up
Ce
Ci
+
2 CL
C
s
–
=
相关PDF资料 |
PDF描述 |
|---|---|
| Q80C32-36:R | 8-BIT, 36 MHz, MICROCONTROLLER, CQFP44 |
| Q80C32-36SHXXX:R | 8-BIT, 36 MHz, MICROCONTROLLER, CQFP44 |
| Q80C32-42:D | 8-BIT, 42 MHz, MICROCONTROLLER, CQFP44 |
| Q80C32-42:R | 8-BIT, 42 MHz, MICROCONTROLLER, CQFP44 |
| Q80C32-42SHXXX:D | 8-BIT, 42 MHz, MICROCONTROLLER, CQFP44 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| Q80N-5 | 制造商:POWERBOX 制造商全称:Powerbox 功能描述:0.5 WATTS - 100 - 10KV SINGLE OUTPUT DC/DC INDUSTRIAL |
| Q-810 | 功能描述:交流电源插头和插座 NEMA L5-15P LOCKING DEVICE RoHS:否 制造商:Hirose Connector 产品:Plugs 系列: 电流额定值:3 A 电压额定值:30 V 安装角:Straight 安装风格:Cable 颜色: 端口数量: |
| Q81022511000000 | 制造商:Epson Electronics America Inc 功能描述:TF2-J4DB1 184.3200MHZ |
| Q811 | 制造商:Captive Fastener Corporation 功能描述: |
| Q-812 | 制造商:Qualtek Electronics Corporation 功能描述:NEMA TWIST-LOCK 制造商:Qualtek Electronics Corporation 功能描述:Nema St Blade Twist Lock |
发布紧急采购，3分钟左右您将得到回复。