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您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄45382 > MQ83C154XXX-30P883D (ATMEL CORP) 8-BIT, MROM, 30 MHz, MICROCONTROLLER, CQFP44 PDF資料下載

型號(hào)：	MQ83C154XXX-30P883D
廠商：	ATMEL CORP
元件分類：	微控制器/微處理器
英文描述：	8-BIT, MROM, 30 MHz, MICROCONTROLLER, CQFP44
封裝：	CERAMIC, QFP-44
文件頁(yè)數(shù)：	101/963頁(yè)
文件大?。?/td>	11933K
代理商：	MQ83C154XXX-30P883D

32142D–06/2013

ATUC64/128/256L3/4U

TWI Pins PA05/PA07/PA17

When these pins are used for TWI, the pins are open-drain outputs with slew-rate limitation and

inputs with spike filtering. When used as GPIO pins or used for other peripherals, the pins have

the same characteristics as other GPIO pins.

After reset a TWI function is selected on these pins instead of the GPIO. Please refer to the

GPIO Module Configuration chapter for details.

GPIO Pins

All the I/O lines integrate a pull-up resistor

Programming of this pull-up resistor is performed

independently for each I/O line through the GPIO Controllers. After reset, I/O lines default as

inputs with pull-up resistors disabled, except PA00 which has the pull-up resistor enabled. PA20

selects SCIF-RC32OUT (GPIO Function F) as default enabled after reset.

High-drive Pins

The six pins PA02, PA06, PA08, PA09, PB01, and PB15 have high-drive output capabilities.

Refer to Section 35. on page 897 for electrical characteristics.

USB Pins PB13/PB14

When these pins are used for USB, the pins are behaving according to the USB specification.

When used as GPIO pins or used for other peripherals, the pins have the same behaviour as

other normal I/O pins, but the characteristics are different. Refer to Section 35. on page 897 for

electrical characteristics.

To be able to use the USB I/O the VDDIN power supply must be 3.3V nominal.

RC32OUT Pin

Clock output at startup

After power-up, the clock generated by the 32kHz RC oscillator (RC32K) will be output on PA20,

even when the device is still reset by the Power-On Reset Circuitry. This clock can be used by

the system to start other devices or to clock a switching regulator to rise the power supply volt-

age up to an acceptable value.

The clock will be available on PA20, but will be disabled if one of the following conditions are

PA20 is configured to use a GPIO function other than F (SCIF-RC32OUT)

PA20 is configured as a General Purpose Input/Output (GPIO)

The bit FRC32 in the Power Manager PPCR register is written to zero (refer to the Power

Manager chapter)

The maximum amplitude of the clock signal will be defined by VDDIN.

Once the RC32K output on PA20 is disabled it can never be enabled again.

XOUT32_2 function

PA20 selects RC32OUT as default enabled after reset. This function is not automatically dis-

abled when the user enables the XOUT32_2 function on PA20. This disturbs the oscillator and

may result in the wrong frequency. To avoid this, RC32OUT must be disabled when XOUT32_2

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