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| 型号： | PIC10F222T-E/OT |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, FLASH, 8 MHz, RISC MICROCONTROLLER, PDSO6 |
| 封装： | LEAD FREE, PLASTIC, SOT-23, 6 PIN |
| 文件页数： | 22/80页 |
| 文件大小： | 1069K |
| 代理商： | PIC10F222T-E/OT |
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2007 Microchip Technology Inc.
Preliminary
DS41270D-page 27
PIC10F220/222
6.1.2
TIMER0 INCREMENT DELAY
Since the prescaler output is synchronized with the
internal clocks, there is a small delay from the time the
external clock edge occurs to the time the Timer0 mod-
ule is actually incremented. Figure 6-4 shows the delay
from the external clock edge to the timer incrementing.
FIGURE 6-4:
TIMER0 TIMING WITH EXTERNAL CLOCK
6.2
Prescaler
An 8-bit counter is available as a prescaler for the
Timer0 module or as a postscaler for the Watchdog
Timer (WDT), respectively (see Section 8.6 “Watch-
dog Timer (WDT)”). For simplicity, this counter is
being referred to as “prescaler” throughout this data
sheet.
The PSA and PS<2:0> bits (OPTION<3:0>) determine
prescaler assignment and prescale ratio.
When assigned to the Timer0 module, all instructions
writing
to
the
TMR0
register
(e.g.,
CLRF 1,
MOVWF 1,
BSF 1,x,
etc.) will clear the prescaler.
When assigned to WDT, a CLRWDT instruction will clear
the prescaler along with the WDT. The prescaler is
neither readable nor writable. On a Reset, the
prescaler contains all ‘0’s.
Increment Timer0 (Q4)
External Clock Input or
Q1 Q2 Q3 Q4
Timer0
T0
T0 + 1
T0 + 2
Small pulse
misses sampling
External Clock/Prescaler
Output After Sampling
(3)
Prescaler Output(2)
(1)
Note 1: Delay from clock input change to Timer0 increment is 3TOSC to 7TOSC. (Duration of Q = TOSC).
Therefore, the error in measuring the interval between two edges on Timer0 input = ±4TOSC max.
2: External clock if no prescaler selected; prescaler output otherwise.
3: The arrows indicate the points in time where sampling occurs.
Note:
The prescaler may be used by either the
Timer0 module or the WDT, but not both.
Thus, a prescaler assignment for the
Timer0 module means that there is no
prescaler for the WDT and vice-versa.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PIC10F222TI/MC | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:High-Performance Microcontrollers with 8-bit A/D |
| PIC10F222T-I/MC | 功能描述:8位微控制器 -MCU 0.75KB 23B RAM 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 |
| PIC10F222TI/OT | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:High-Performance Microcontrollers with 8-bit A/D |
| PIC10F222T-I/OT | 功能描述:8位微控制器 -MCU 768 B FL 16 RAM 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 |
| PIC10F222T-I/OT | 制造商:Microchip Technology Inc 功能描述:8-Bit Microcontroller IC |
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