參數(shù)資料
型號： ATMEGA103-6AI
廠商： Atmel
文件頁數(shù)： 58/141頁
文件大?。?/td> 0K
描述： IC MCU 128K 6MHZ A/D IT 64TQFP
產(chǎn)品培訓(xùn)模塊： megaAVR Introduction
標準包裝： 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
23
ATmega103(L)
0945I–AVR–02/07
Bits 4, 3 – SM1/SM0: Sleep Mode Select Bits 1 and 0
This bit selects between the three available sleep modes as shown in Table 3.
Bits 2..0 – Res: Reserved Bits
These bits are reserved bits in the ATmega103(L) and always read as zero.
XTAL Divide Control Register
– XDIV
The XTAL Divide Control Register is used to divide the XTAL clock frequency by a num-
ber in the range 1 - 129. This feature can be used to decrease power consumption when
the requirement for processing power is low.
Bit 7 – XDIVEN: XTAL Divide Enable
When the XDIVEN bit is set (one), the clock frequency of the CPU and all peripherals is
divided by the factor defined by the setting of XDIV6 - XDIV0. This bit can be set and
cleared run-time to vary the clock frequency as suitable to the application.
Bits 6..0 – XDIV6..XDIV0: XTAL Divide Select Bits 6 - 0
These bits define the division factor that applies when the XDIVEN bit is set (one). If the
value of these bits is denoted d, the following formula defines the resulting CPU clock
frequency f
clk:
The value of these bits can only be changed when XDIVEN is zero. When XDIVEN is
set to one, the value written simultaneously into XDIV6..XDIV0 is taken as the division
factor. When XDIVEN is cleared to zero, the value written simultaneously into
XDIV6..XDIV0 is rejected. As the divider divides the Master Clock Input to the MCU, the
speed of all peripherals is reduced when a division factor is used.
Reset and Interrupt
Handling
The ATmega103(L) provides 23 different interrupt sources. These interrupts and the
separate Reset Vector each have a separate Program Vector in the Program memory
space. All interrupts are assigned individual enable bits that must be set (one) together
with the I-bit in the Status Register in order to enable the interrupt.
The lowest addresses in the Program memory space are automatically defined as the
Reset and Interrupt Vectors. The complete list of vectors is shown in Table 4. The list
also determines the priority levels of the different interrupts. The lower the address, the
Table 3. Sleep Mode Select
SM1
SM0
Sleep Mode
0
Idle mode
01
Reserved
10
Power-down
11
Power-save
Bit
7
65
43
21
0
$3C ($5C)
XDIVEN
XDIV6
XDIV5
XDIV4
XDIV3
XDIV2
XDIV1
XDIV0
XDIV
Read/Write
R/W
Initial Value
0
f
CLK
XTAL
129
d
–
-------------------
=
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參數(shù)描述
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