參數(shù)資料
型號: PIC12F683-I/P
廠商: Microchip Technology
文件頁數(shù): 124/176頁
文件大?。?/td> 0K
描述: IC MCU FLASH 2KX14 8DIP
產(chǎn)品培訓(xùn)模塊: Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
Digi-Key 應(yīng)用說明: AN0005 PWM Example with Microchip's CCP Module
AN0005 Example Code
標(biāo)準(zhǔn)包裝: 60
系列: PIC® 12F
核心處理器: PIC
芯體尺寸: 8-位
速度: 20MHz
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 5
程序存儲(chǔ)器容量: 3.5KB(2K x 14)
程序存儲(chǔ)器類型: 閃存
EEPROM 大?。?/td> 256 x 8
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 4x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 8-DIP(0.300",7.62mm)
包裝: 管件
產(chǎn)品目錄頁面: 645 (CN2011-ZH PDF)
配用: DM163029-ND - BOARD PICDEM FOR MECHATRONICS
AC162058-ND - HEADER MPLAB ICD2 FOR PIC12F683
I3-DB12F683-ND - BOARD DAUGHTER ICEPIC3
ACICE0201-ND - MPLABICE 8P 300 MIL ADAPTER
AC124001-ND - MODULE SKT PROMATEII 8DIP/SOIC
2007 Microchip Technology Inc.
DS41211D-page 49
PIC12F683
7.0
TIMER2 MODULE
The Timer2 module is an 8-bit timer with the following
features:
8-bit timer register (TMR2)
8-bit period register (PR2)
Interrupt on TMR2 match with PR2
Software programmable prescaler (1:1, 1:4, 1:16)
Software programmable postscaler (1:1 to 1:16)
See Figure 7-1 for a block diagram of Timer2.
7.1
Timer2 Operation
The clock input to the Timer2 module is the system
instruction clock (FOSC/4). The clock is fed into the
Timer2 prescaler, which has prescale options of 1:1,
1:4 or 1:16. The output of the prescaler is then used to
increment the TMR2 register.
The values of TMR2 and PR2 are constantly compared
to determine when they match. TMR2 will increment
from 00h until it matches the value in PR2. When a
match occurs, two things happen:
TMR2 is reset to 00h on the next increment cycle.
The Timer2 postscaler is incremented
The match output of the Timer2/PR2 comparator is
then fed into the Timer2 postscaler. The postscaler has
postscale options of 1:1 to 1:16 inclusive. The output of
the Timer2 postscaler is used to set the TMR2IF
interrupt flag bit in the PIR1 register.
The TMR2 and PR2 registers are both fully readable
and writable. On any Reset, the TMR2 register is set to
00h and the PR2 register is set to FFh.
Timer2 is turned on by setting the TMR2ON bit in the
T2CON register to a ‘1’. Timer2 is turned off by clearing
the TMR2ON bit to a ‘0’.
The Timer2 prescaler is controlled by the T2CKPS bits
in the T2CON register. The Timer2 postscaler is
controlled by the TOUTPS bits in the T2CON register.
The prescaler and postscaler counters are cleared
when:
A write to TMR2 occurs.
A write to T2CON occurs.
Any device Reset occurs (Power-on Reset, MCLR
Reset, Watchdog Timer Reset, or Brown-out
Reset).
FIGURE 7-1:
TIMER2 BLOCK DIAGRAM
Note:
TMR2 is not cleared when T2CON is
written.
Comparator
TMR2
Sets Flag
TMR2
Output
Reset
Postscaler
Prescaler
PR2
2
FOSC/4
1:1 to 1:16
1:1, 1:4, 1:16
EQ
4
bit TMR2IF
TOUTPS<3:0>
T2CKPS<1:0>
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