參數(shù)資料
型號: PIC16C433T-E/SO
廠商: Microchip Technology
文件頁數(shù): 104/126頁
文件大?。?/td> 0K
描述: IC MCU CMOS 8BIT 10MHZ 2K 18SOIC
標準包裝: 1,100
系列: PIC® 16C
核心處理器: PIC
芯體尺寸: 8-位
速度: 10MHz
連通性: LIN(本地互連網(wǎng)絡)
外圍設備: POR,WDT
輸入/輸出數(shù): 5
程序存儲器容量: 3.5KB(2K x 14)
程序存儲器類型: OTP
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 4.5 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 4x8b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 125°C
封裝/外殼: 18-SOIC(0.295",7.50mm 寬)
包裝: 帶卷 (TR)
79
4378C–AVR–09/08
AT90PWM1
14. 8-bit Timer/Counter0 with PWM
Timer/Counter0 is a general purpose 8-bit Timer/Counter module, with two independent Output
Compare Units, and with PWM support. It allows accurate program execution timing (event man-
agement) and wave generation. The main features are:
Two Independent Output Compare Units
Double Buffered Output Compare Registers
Clear Timer on Compare Match (Auto Reload)
Glitch Free, Phase Correct Pulse Width Modulator (PWM)
Variable PWM Period
Frequency Generator
Three Independent Interrupt Sources (TOV0, OCF0A, and OCF0B)
14.1
Overview
A simplified block diagram of the 8-bit Timer/Counter is shown in Figure 14-1. For the actual
placement of I/O pins, refer to “Pin Descriptions” on page 7. CPU accessible I/O Registers,
including I/O bits and I/O pins, are shown in bold. The device-specific I/O Register and bit loca-
The PRTIM0 bit in “Power Reduction Register” on page 39 must be written to zero to enable
Timer/Counter0 module.
Figure 14-1. 8-bit Timer/Counter Block Diagram
14.1.1
Definitions
Many register and bit references in this section are written in general form. A lower case “n”
replaces the Timer/Counter number, in this case 0. A lower case “x” replaces the Output Com-
pare Unit, in this case Compare Unit A or Compare Unit B. However, when using the register or
bit defines in a program, the precise form must be used, i.e., TCNT0 for accessing
Timer/Counter0 counter value and so on.
Timer/Counter
D
ATA
B
U
S
=
TCNTn
Waveform
Generation
OCnA
Control Logic
count
clear
direction
TOVn
(Int.Req.)
OCRnx
TCCRnA
Clock Select
Tn
Edge
Detector
( From Prescaler )
clkTn
OCnA
(Int.Req.)
=
OCRnx
Waveform
Generation
OCnB
(Int.Req.)
TCCRnB
=
Fixed
TOP
Values
= 0
TOP
BOTTOM
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