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| 型号： | PIC16LF1937-E/MV |
| 厂商： | Microchip Technology |
| 文件页数： | 10/14页 |
| 文件大小： | 0K |
| 描述： | IC PIC MCU FLASH 512KX14 40UQFN |
| 标准包装： | 73 |
| 系列： | PIC® XLP™ 16F |
| 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，LCD，POR，PWM，WDT |
| 输入/输出数： | 36 |
| 程序存储器容量： | 14KB（8K x 14） |
| 程序存储器类型： | 闪存 |
| EEPROM 大小： | 256 x 8 |
| RAM 容量： | 512 x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 1.8 V ~ 3.6 V |
| 数据转换器： | A/D 14x10b |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 40-UFQFN 裸露焊盘 |
| 包装： | 管件 |
2009-2012 Microchip Technology Inc.
DS80479K-page 5
PIC16(L)F1934/1936/1937
5.
Module: ADC
5.1 Analog-to-Digital Conversion
An ADC conversion may not complete under these
conditions:
1.
When FOSC is greater than 8 MHz and it is the
clock source used for the ADC converter.
2.
The ADC is operating from its dedicated internal
FRC oscillator and the device is not in Sleep
mode (any FOSC frequency).
When this occurs, the ADC Interrupt Flag (ADIF)
does not get set, the GO/DONE bit does not get
cleared, and the conversion result does not get
loaded into the ADRESH and ADRESL result
registers.
Work around
Method 1: Select the system clock, FOSC, as
the ADC clock source and reduce
the FOSC frequency to 8 MHz or
less
when
performing
ADC
conversions.
Method 2: Select
the
dedicated
FRC
oscillator as the ADC conversion
clock source and perform all
conversions with the device in
Sleep.
Method 3: This method is provided if the
application cannot use Sleep
mode and requires continuous
operation at frequencies above 8
MHz. This method requires early
termination of an ADC conver-
sion. Provide a fixed time delay in
software
to
stop
the
A-to-D
conversion manually, after all 10
bits are converted, but before the
conversion
would
complete
automatically. The conversion is
stopped by clearing the GO/
DONE bit in software. The GO/
DONE bit must be cleared during
the last TAD cycle, before the
conversion
would
have
completed automatically. Refer to
Figure 1 for details.
FIGURE 1:
INSTRUCTION CYCLE DELAY CALCULATION EXAMPLE
required to complete the full conversion. Each TAD
cycle consists of 8 TCY periods. A fixed delay is
provided to stop the A/D conversion after 86
instruction cycles and terminate the conversion at
the correct time as shown in the figure above.
FOSC = 32 MHz
TCY = 4/32 MHz = 125 nsec
TAD = 1 sec, ADCS = FOSC/32
88 TCY
84 TCY
8 TCY
4 TCY
1 TAD
11 TAD
Stop the A/D conversion
between 10.5 and 11 TAD
cycles.
See the Analog-to-Digital
Conversion Timing diagram
in
the
Analog-to-Digital
Converter chapter of the
device data sheet.
}
See the ADC Clock Period (TAD) vs. Device Operating Frequencies table, in the Analog-to-Digital Converter
chapter of the device data sheet.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PIC16LF1937-I/ML | 功能描述:8位微控制器 -MCU 14KB Flash, 512B RAM 256B EE LCD 1.8-5.5V 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 |
| PIC16LF1937-I/MV | 功能描述:8位微控制器 -MCU 14KB Flash EEPROM 256b nanoWatt 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 |
| PIC16LF1937-I/P | 功能描述:8位微控制器 -MCU 14KB Flash, 512B RAM 256B EE LCD 1.8-5.5V 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 |
| PIC16LF1937-I/PT | 功能描述:8位微控制器 -MCU 14KB Flash, 512B RAM 256B EE LCD 1.8-5.5V 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 |
| PIC16LF1937T-I/ML | 功能描述:8位微控制器 -MCU 14KB Flash 512B RAM 256B EE LCD 1.8-5.5V 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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