參數(shù)資料
型號: ATMEGA103-6AI
廠商: Atmel
文件頁數(shù): 74/141頁
文件大小: 0K
描述: IC MCU 128K 6MHZ A/D IT 64TQFP
產(chǎn)品培訓(xùn)模塊: megaAVR Introduction
標(biāo)準(zhǔn)包裝: 90
系列: AVR® ATmega
核心處理器: AVR
芯體尺寸: 8-位
速度: 6MHz
連通性: SPI,UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 32
程序存儲器容量: 128KB(64K x 16)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 4K x 8
RAM 容量: 4K x 8
電壓 - 電源 (Vcc/Vdd): 4 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 64-TQFP
包裝: 托盤
配用: ATSTK501-ND - ADAPTER KIT FOR 64PIN AVR MCU
38
ATmega103(L)
0945I–AVR–02/07
Timer/Counters
The ATmega103(L) provides three general purpose Timer/Counters – two 8-bit T/Cs
and one 16-bit T/C. Timer/Counter0 optionally can be asynchronously clocked from an
external Oscillator. This Oscillator is optimized for use with a 32.768 kHz crystal,
enabling use of Timer/Counter0 as a Real Time Clock (RTC). Timer/Counter0 has its
own prescaler. Timer/Counters 1 and 2 have individual prescaling selection from the
same 10-bit prescaling timer. These Timer/Counters can either be used as a Timer with
an internal clock time base or as a counter with an external pin connection that triggers
the counting.
Timer/Counter
Prescalers
Figure 28. Prescaler for Timer/Counter1 and Timer/Counter2
For Timer/Counters 1 and 2, the four different prescaled selections are: CK/8, CK/64,
CK/256 and CK/1024, where CK is the CPU clock. Observe that CPU clock frequency
can be lower t han th e XTAL fr eq uen cy if th e XTAL divide r is e nable d. Fo r
Timer/Counters 1 and 2, added selections as CK, external source and stop can be
selected as clock sources.
Figure 29. The Timer/Counter0 Prescaler
10-BIT T/C PRESCALER
TIMER/COUNTER2 CLOCK SOURCE
TCK2
TIMER/COUNTER1 CLOCK SOURCE
TCK1
CK
T2
T1
CS20
CS10
CS21
CS11
CS22
CS12
CK/8
CK/256
CK/1024
CK/64
0
10-BIT T/C PRESCALER
TIMER/COUNTER0 CLOCK SOURCE
PCK0
CK
PCK0
TOSC1
AS0
CS00
CS01
CS02
PCK0/8
PCK0/64
PCK0/128
PCK0/1024
PCK0/256
PCK0/32
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