參數(shù)資料
型號: ATTINY43U-MUR
廠商: Atmel
文件頁數(shù): 153/158頁
文件大?。?/td> 0K
描述: MCU AVR 4KB FLASH 8MHZ 20QFN
產(chǎn)品培訓(xùn)模塊: tinyAVR Introduction
標(biāo)準包裝: 6,000
系列: AVR® ATtiny
核心處理器: AVR
芯體尺寸: 8-位
速度: 8MHz
連通性: USI
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,PWM,溫度傳感器,WDT
輸入/輸出數(shù): 16
程序存儲器容量: 4KB(2K x 16)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 64 x 8
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 1.8 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: 20-WFQFN 裸露焊盤
包裝: 帶卷 (TR)
94
8048C–AVR–02/12
ATtiny43U
Table 12-7 shows the COMnB[1:0] bit functionality when the WGMn[2:0] bits are set to phase
correct PWM mode.
Note:
1. A special case occurs when OCRnB equals TOP and COMnB1 is set. In this case, the Com-
pare Match is ignored, but the set or clear is done at TOP. See “Phase Correct PWM Mode” on
page 88 for more details.
Bits 3:2 – Res: Reserved Bits
These bits are reserved and will always read zero.
Bits 1:0 – WGMn[1:0]: Waveform Generation Mode
Combined with the WGMn2 bit found in the TCCRnB Register, these bits control the counting
sequence of the counter, the source for maximum (TOP) counter value, and what type of wave-
form generation to be used, see Table 12-8. Modes of operation supported by the Timer/Counter
unit are: Normal mode (counter), Clear Timer on Compare Match (CTC) mode, and two types of
Pulse Width Modulation (PWM) modes (see “Modes of Operation” on page 85).
Note:
1. MAX = 0xFF, BOTTOM = 0x00
Table 12-7.
Compare Output Mode, Phase Correct PWM Mode(1)
COMnB1
COMnB0
Description
0
Normal port operation, OCnB disconnected.
01
Reserved
10
Clear OCnB on Compare Match when up-counting. Set OCnB on
Compare Match when down-counting.
11
Set OCnB on Compare Match when up-counting. Clear OCnB on
Compare Match when down-counting.
Table 12-8.
Waveform Generation Mode Bit Description
Mode
WGMn2
WGMn1
WGMn0
Timer/Counter
Mode of
Operation
TOP
Update of
OCRx at
TOV Flag
Set on
0
Normal
0xFF
Immediate
MAX
1
001
PWM, Phase
Correct
0xFF
TOP
BOTTOM
2
0
1
0
CTC
OCRnA
Immediate
MAX
3
011
Fast PWM
0xFF
TOP
MAX
4
100
Reserved
5
101
PWM, Phase
Correct
OCRnA
TOP
BOTTOM
6
110
Reserved
7
111
Fast PWM
OCRnA
TOP
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