參數(shù)資料
型號(hào)： PIC12F519-I/MS
廠商： Microchip Technology
文件頁數(shù)： 30/96頁
文件大?。?/td> 0K
描述： IC PIC MCU FLASH 1KX12 8MSOP
產(chǎn)品培訓(xùn)模塊： Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
標(biāo)準(zhǔn)包裝： 100
系列： PIC® 12F
核心處理器： PIC
芯體尺寸： 8-位
速度： 8MHz
外圍設(shè)備： POR，WDT
輸入/輸出數(shù)： 5
程序存儲(chǔ)器容量： 1.5KB（1K x 12）
程序存儲(chǔ)器類型： 閃存
RAM 容量： 41 x 8
電壓 - 電源 (Vcc/Vdd)： 2 V ~ 5.5 V
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 8-TSSOP，8-MSOP（0.118"，3.00mm 寬）
包裝： 管件
產(chǎn)品目錄頁面： 637 (CN2011-ZH PDF)
配用： AC162096-ND - HEADER MPLAB ICD2 PIC16F526 8/14
AC164325-ND - MODULE SKT FOR 8MSOP
PIC12F519
DS41319B-page 34
2008 Microchip Technology Inc.
7.2
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-
). 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 TMR0,
MOVWF TMR0,
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 con-
tains all ‘0’s.
7.2.1
SWITCHING PRESCALER
ASSIGNMENT
The prescaler assignment is fully under software
control (i.e., it can be changed “on-the-fly” during pro-
gram execution). To avoid an unintended device Reset,
the following instruction sequence (Example 7-1) must
be executed when changing the prescaler assignment
from Timer0 to the WDT.
EXAMPLE 7-1:
CHANGING PRESCALER
(TIMER0
→ WDT)
To change the prescaler from the WDT to the Timer0
module, use the sequence shown in Example 7-2. This
sequence must be used even if the WDT is disabled. A
CLRWDT
instruction should be executed before
switching the prescaler.
EXAMPLE 7-2:
CHANGING PRESCALER
(WDT
→ TIMER0)
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.
CLRWDT
;Clear WDT
CLRF
TMR0
;Clear TMR0 and Prescaler
MOVLW
b‘00xx1111’
OPTION
CLRWDT
;PS<2:0> are 000 or 001
MOVLW
b‘00xx1xxx’ ;Set Postscaler to
OPTION
;desired WDT rate
CLRWDT
;Clear WDT and
;prescaler
MOVLW
b‘xxxx0xxx’ ;Select TMR0, new
;prescale value and
;clock source
OPTION
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PIC12F519T-E/MC 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:8-Pin, 8-Bit Flash Microcontroller
PIC12F519T-E/MS 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:8-Pin, 8-Bit Flash Microcontroller
PIC12F519T-E/P 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:8-Pin, 8-Bit Flash Microcontroller
PIC12F519T-E/SN 制造商:Microchip Technology Inc 功能描述:8-PIN, 1.5KB FLASH PROGRAM, 64 - Tape and Reel
PIC12F519T-I/MC 功能描述:8位微控制器 -MCU 15KB Flash Prgrm 64B 8MHz Intrnl Oscilatr RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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