收藏本站
2010-2012 Microchip Technology Inc.
DS39977F-page 227
PIC18F66K80 FAMILY
16.3
Timer3 16-Bit Read/Write Mode
Timer3 can be configured for 16-bit reads and writes
(see Figure 16.3). When the RD16 control bit
(T3CON<1>) is set, the address for TMR3H is mapped
to a buffer register for the high byte of Timer3. A read
from TMR3L will load the contents of the high byte of
Timer3 into the Timer3 High Byte Buffer register. This
provides users with the ability to accurately read all
16 bits of Timer3 without having to determine whether a
read of the high byte, followed by a read of the low byte,
has become invalid due to a rollover between reads.
A write to the high byte of Timer3 must also take place
through the TMR3H Buffer register. The Timer3 high
byte is updated with the contents of TMR3H when a
write occurs to TMR3L. This allows users to write all
16 bits to both the high and low bytes of Timer3 at once.
The high byte of Timer3 is not directly readable or
writable in this mode. All reads and writes must take
place through the Timer3 High Byte Buffer register.
Writes to TMR3H do not clear the Timer3 prescaler.
The prescaler is only cleared on writes to TMR3L.
16.4
Using the SOSC Oscillator as the
Timer3 Clock Source
The SOSC internal oscillator may be used as the clock
source for Timer3. It can be enabled in one of these
ways:
Setting the SOSCEN bit in either the T1CON or
T3CON register (TxCON<3>)
Setting the SOSCGO bit in the OSCCON2 register
(OSCCON2<3>)
Setting the SCSx bits to secondary clock source in
the OSCCON register (OSCCON<1:0> = 01)
The SOSCGO bit is used to warm up the SOSC so that
it is ready before any peripheral requests it.
To use it as the Timer3 clock source, the TMR3CSx bits
must also be set. As previously noted, this also config-
ures Timer3 to increment on every rising edge of the
oscillator source.
The SOSC oscillator is described in Section 14.5
“SOSC Oscillator”
.
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
PIC16C55-RC/P IC MCU OTP 512X12 28DIP
SFW23R-2STE1 SFW23R-2STE1-FFC/FPC CONN
PIC24FJ64GA002-E/SS IC PIC MCU FLASH 64K 28-SSOP
PIC18LF46K22-I/ML IC PIC MCU 64KB FLASH 44QFN
PIC18F45K80-I/ML MCU PIC 32KB FLASH 44QFN
PIC24F32KA302-I/ML MCU 32KB FLASH 2KB RAM 28-QFN
PIC18LF45K80-I/ML MCU PIC ECAN 32KBFLASH 44QFN
PIC18F4221-I/PT IC PIC MCU FLASH 2KX16 44TQFP
相关代理商/技术参数
PIC18F26K80-I/SO 功能描述:8位微控制器 -MCU 64KB FL 4KBRM 16MIPS 12bit ADC CTMU 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
PIC18F26K80-I/SP 功能描述:8位微控制器 -MCU 64KB FL 4KBRM 16MIPS 12bit ADC CTMU 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
PIC18F26K80-I/SS 功能描述:8位微控制器 -MCU 64KB FL 4KBRM 16MIPS 12bit ADC CTMU 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
PIC18F26K80T-I/ML 功能描述:8位微控制器 -MCU 64KB FL 4KBRM 16MIPS 12bit ADC CTMU 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
PIC18F26K80T-I/MM 功能描述:8位微控制器 -MCU ECAN 64KB FL 4KBRM 16 MIPS 12b ADC CTMU 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
PIC18F26K80T-I/SO 功能描述:8位微控制器 -MCU 64KB FL 4KBRM 16MIPS 12bit ADC CTMU 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
PIC18F26K80T-I/SS 功能描述:8位微控制器 -MCU 64KB FL 4KBRM 16MIPS 12bit ADC CTMU 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
PIC18F27J13-I/ML 功能描述:8位微控制器 -MCU 128KB Flash 4KB RAM 12MIPS 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