參數資料
型號: MQ80C52XXX-36/883
廠商: ATMEL CORP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 36 MHz, MICROCONTROLLER, CQFP44
封裝: CERAMIC, QFP-44
文件頁數: 148/152頁
文件大?。?/td> 2528K
代理商: MQ80C52XXX-36/883
93
8151H–AVR–02/11
ATmega128A
14. 8-bit Timer/Counter0 with PWM and Asynchronous Operation
14.1
Features
Single Channel Counter
Clear Timer on Compare Match (Auto Reload)
Glitch-free, Phase Correct Pulse Width Modulator (PWM)
Frequency Generator
10-bit Clock Prescaler
Overflow and Compare Match Interrupt Sources (TOV0 and OCF0)
Allows Clocking from External 32kHz Watch Crystal Independent of the I/O Clock
14.2
Overview
Timer/Counter0 is a general purpose, single channel, 8-bit Timer/Counter module. 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 Configurations” on page 2. 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 locations are listed in the
Figure 14-1. 8-bit Timer/Counter Block Diagram
Timer/Counter
D
ATA
B
U
S
=
TCNTn
Waveform
Generation
OCn
= 0
Control Logic
= 0xFF
TOP
BOTTOM
count
clear
direction
TOVn
(Int.Req.)
OCn
(Int.Req.)
Synchronization Unit
OCRn
TCCRn
ASSRn
Status flags
clk
I/O
clk
ASY
Synchronized Status flags
asynchronous mode
select (ASn)
TOSC1
T/C
Oscillator
TOSC2
Prescaler
clk
Tn
clk
I/O
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