參數(shù)資料
型號： S12BKPV1D
廠商： Motorola, Inc.
英文描述： MC9S12DT128 Device User Guide V02.09
中文描述： MC9S12DT128設(shè)備的用戶手冊V02.09
文件頁數(shù)： 111/138頁
文件大?。?/td> 2083K
代理商： S12BKPV1D
MC9S12DT128 Device User Guide — V02.09
111
A.3 NVM, Flash and EEPROM
NOTE:
Unless otherwise noted the abbreviation NVM (Non Volatile Memory) is used for
both Flash and EEPROM.
A.3.1 NVM timing
The time base for all NVM program or erase operations is derived from the oscillator. A minimum
oscillator frequency f
NVMOSC
is required for performing program or erase operations. The NVM modules
do not have any means to monitor the frequency and will not prevent program or erase operation at
frequencies above or below the specified minimum. Attempting to program or erase the NVM modules at
a lower frequency a full program or erase transition is not assured.
The Flash and EEPROM program and erase operations are timed using a clock derived from the oscillator
using the FCLKDIV and ECLKDIV registers respectively. The frequency of this clock must be set within
the limits specified as f
NVMOP
.
The minimum program and erase times shown in
Table A-11
are calculated for maximum f
NVMOP
and
maximum f
bus
. The maximum times are calculated for minimum f
NVMOP
and a f
bus
of 2MHz.
A.3.1.1 Single Word Programming
The programming time for single word programming is dependant on the bus frequency as a well as on
the frequency f
NVMOP
and can be calculated according to the following formula.
t
swpgm
f
NVMOP
A.3.1.2 Row Programming
ThisappliesonlytotheFlashwhereupto32wordsinarowcanbeprogrammedconsecutivelybykeeping
the command pipeline filled. The time to program a consecutive word can be calculated as:
The time to program a whole row is:
Row programming is more than 2 times faster than single word programming.
A.3.1.3 Sector Erase
Erasing a 512 byte Flash sector or a 4 byte EEPROM sector takes:
9
--------1
25
1
f
bus
----------
+
=
t
bwpgm
4
1
f
NVMOP
---------------------
9
1
f
bus
----------
+
=
t
brpgm
t
swpgm
31 t
bwpgm
+
=
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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S12B-PADSS-1-GW 制造商:JST Manufacturing 功能描述:12 Position Side Entry Shrouded Header
S12B-PASK-2 功能描述:CONN HEADR PA 12POS SIDE 2MM TIN RoHS:否 類別:連接器，互連式 >> 矩形- 接頭，公引腳 系列:PA 標(biāo)準(zhǔn)包裝:1 系列:- 觸點(diǎn)類型：:公形引腳 連接器類型:接頭，無罩 位置數(shù):16 加載位置的數(shù)目:全部 間距:0.100"（2.54mm） 行數(shù):1 行間距:- 觸點(diǎn)接合長度:0.230"（5.84mm） 安裝類型:通孔 端子:焊接 緊固型:- 特點(diǎn):- 觸點(diǎn)表面涂層:錫 觸點(diǎn)涂層厚度:100µin（2.54µm） 顏色:黑 包裝:散裝 配套產(chǎn)品:S7049-ND - CONN HEADER FMALE 16POS .1" GOLDS7014-ND - CONN HEADER FEMALE 16POS.1" TINS5647-ND - CONN FMALE 16POS .1" SMD GOLDS5608-ND - CONN FEMALE 16POS .1" SMD TINS5491-ND - CONN FEMALE 16POS .100" R/A GOLDS5452-ND - CONN FEMALE 16POS .100" R/A TINS4546-ND - CONN FMALE 16POS .1" SMD GOLDS4507-ND - CONN FEMALE 16POS .1" SMD TINS4390-ND - CONN FEMALE 16POS .100" R/A GOLDS4351-ND - CONN FEMALE 16POS .100" R/A TIN更多... 其它名稱:S1022-16
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