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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)：	937/963頁(yè)
文件大?。?/td>	11933K
代理商：	MQ83C154XXX-30P883D

32142D–06/2013

ATUC64/128/256L3/4U

eral bus clock, where n is the ratio of the PB clock frequency to the GCLK_CAT frequency.

This results in premature loss of charge from the sense capacitors and thus increased vari-

ability of the acquired count values.

Fix/Workaround

Enable the 1kOhm drive resistors on all implemented QMatrix Y lines (CSA 1, 3, 5, 7, 9, 11,

13, and/or 15) by writing ones to the corresponding odd bits of the CSARES register.

Autonomous CAT acquisition must be longer than AST source clock period

When using the AST to trigger CAT autonomous touch acquisition in sleep modes where the

CAT bus clock is turned off, the CAT will start several acquisitions if the period of the AST

source clock is larger than one CAT acquisition. One AST clock period after the AST trigger,

the CAT clock will automatically stop and the CAT acquisition can be stopped prematurely,

ruining the result.

Fix/Workaround

Always ensure that the ATCFG1.max field is set so that the duration of the autonomous

touch acquisition is greater than one clock period of the AST source clock.

aWire MEMORY_SPEED_REQUEST command does not return correct CV

The aWire MEMORY_SPEED_REQUEST command does not return a CV corresponding to

the formula in the aWire Debug Interface chapter.

Fix/Workaround

a d d r es s

0 x 10 00 00 00 0

MEMORY_SPEED_REQUEST command and use this formula instead:

Corrupted data in flash may happen after flash page write operations

After a flash page write operation from an external programmer, reading (data read or code

fetch) in flash may fail. This may lead to an exception or to others errors derived from this

corrupted read access.

Fix/Workaround

Before any flash page write operation, each write in the page buffer must preceded by a

write in the page buffer with 0xFFFF_FFFF content at any address in the page.

The RC32K output on PA20 is not always permanently disabled

The RC32K output on PA20 may sometimes re-appear.

Fix/Workaround

Before using RC32K for other purposes, the following procedure has to be followed in order

to properly disable it:

- Run the CPU on RCSYS

- Disable the output to PA20 by writing a zero to PM.PPCR.RC32OUT

- Enable RC32K by writing a one to SCIF.RC32KCR.EN, and wait for this bit to be read as

-----------------

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