- 您现在的位置：买卖IC网 > PDF目录11610 > PIC12F1840T-I/MF (Microchip Technology)MCU 7KB FLASH 256B RAM XLP 8DFN PDF资料下载
参数资料
| 型号： | PIC12F1840T-I/MF |
| 厂商： | Microchip Technology |
| 文件页数： | 76/122页 |
| 文件大小： | 0K |
| 描述： | MCU 7KB FLASH 256B RAM XLP 8DFN |
| 标准包装： | 3,300 |
| 系列： | PIC® XLP™ 12F |
| 核心处理器： | PIC |
| 芯体尺寸： | 8-位 |
| 速度： | 32MHz |
| 连通性： | I²C，LIN，SPI，UART/USART |
| 外围设备： | 欠压检测/复位，POR，PWM，WDT |
| 输入/输出数： | 5 |
| 程序存储器容量： | 7KB（4K x 14） |
| 程序存储器类型： | 闪存 |
| EEPROM 大小： | 256 x 8 |
| RAM 容量： | 256 x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 2.3 V ~ 5.5 V |
| 数据转换器： | A/D 4x10b |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-VDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
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页当前第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页
2011 Microchip Technology Inc.
Preliminary
DS41441B-page 57
PIC12(L)F1840
5.4
Two-Speed Clock Start-up Mode
Two-Speed Start-up mode provides additional power
savings by minimizing the latency between external
oscillator start-up and code execution. In applications
that make heavy use of the Sleep mode, Two-Speed
Start-up will remove the external oscillator start-up
time from the time spent awake and can reduce the
overall power consumption of the device. This mode
allows the application to wake-up from Sleep, perform
a few instructions using the INTOSC internal oscillator
block as the clock source and go back to Sleep without
waiting for the external oscillator to become stable.
Two-Speed Start-up provides benefits when the oscil-
lator module is configured for LP, XT or HS modes.
The Oscillator Start-up Timer (OST) is enabled for
these modes and must count 1024 oscillations before
the oscillator can be used as the system clock source.
If the oscillator module is configured for any mode
other than LP, XT or HS mode, then Two-Speed
Start-up is disabled. This is because the external clock
oscillator does not require any stabilization time after
POR or an exit from Sleep.
If the OST count reaches 1024 before the device
enters Sleep mode, the OSTS bit of the OSCSTAT reg-
ister is set and program execution switches to the
external oscillator. However, the system may never
operate from the external oscillator if the time spent
awake is very short.
5.4.1
TWO-SPEED START-UP MODE
CONFIGURATION
Two-Speed Start-up mode is configured by the
following settings:
IESO (of the Configuration Word 1) = 1; Inter-
nal/External Switchover bit (Two-Speed Start-up
mode enabled).
SCS (of the OSCCON register) = 00.
FOSC<2:0> bits in the Configuration Word 1
configured for LP, XT or HS mode.
Two-Speed Start-up mode is entered after:
Power-on Reset (POR) and, if enabled, after
Power-up Timer (PWRT) has expired, or
Wake-up from Sleep.
TABLE 5-1:
OSCILLATOR SWITCHING DELAYS
Note:
Executing a SLEEP instruction will abort
the oscillator start-up time and will cause
the OSTS bit of the OSCSTAT register to
remain clear.
Switch From
Switch To
Frequency
Oscillator Delay
Sleep/POR
LFINTOSC(1)
MFINTOSC(1)
HFINTOSC(1)
31 kHz
31.25 kHz-500 kHz
31.25kHz-16MHz
Oscillator Warm-up Delay (TWARM)
Sleep/POR
EC, RC(1)
DC – 32 MHz
2 cycles
LFINTOSC
EC, RC(1)
DC – 32 MHz
1 cycle of each
Sleep/POR
Timer1 Oscillator
LP, XT, HS(1)
32 kHz-20 MHz
1024 Clock Cycles (OST)
Any clock source
MFINTOSC(1)
HFINTOSC(1)
31.25 kHz-500 kHz
31.25kHz-16MHz
2
s (approx.)
Any clock source
LFINTOSC(1)
31 kHz
1 cycle of each
Any clock source
Timer1 Oscillator
32 kHz
1024 Clock Cycles (OST)
PLL inactive
PLL active
16-32 MHz
2 ms (approx.)
Note 1:
PLL inactive.
相关PDF资料 |
PDF描述 |
|---|---|
| VE-J3W-IW-F1 | CONVERTER MOD DC/DC 5.5V 100W |
| PIC16LF1903T-I/SS | MCU 7KB FLASH 256B RAM 28SSOP |
| VE-J3V-IW-F1 | CONVERTER MOD DC/DC 5.8V 100W |
| PIC16LF1902-E/SO | MCU 3.5KB FLASH 128B RAM 28SOIC |
| VE-J3P-IW-F3 | CONVERTER MOD DC/DC 13.8V 100W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PIC12F505 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:8/14-Pin, 8-Bit Flash Microcontrollers |
| PIC12F505TE/MC | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:8/14-Pin, 8-Bit Flash Microcontrollers |
| PIC12F505TE/MG | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:8/14-Pin, 8-Bit Flash Microcontrollers |
| PIC12F505TE/MS | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:8/14-Pin, 8-Bit Flash Microcontrollers |
| PIC12F505TE/P | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:8/14-Pin, 8-Bit Flash Microcontrollers |
发布紧急采购，3分钟左右您将得到回复。