參數(shù)資料
型號： MC9S12E64MFU
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： MC9S12E-Family Device User Guide V01.04
中文描述： 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP80
封裝： QFP-80
文件頁數(shù)： 129/156頁
文件大?。?/td> 3077K
代理商： MC9S12E64MFU
129
B.5 Flash NVM
B.5.1 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 program and erase operations are timed using a clock derived from the oscillator using the
FCLKDIV register. The frequency of this clock must be set within the limits specified as f
NVMOP
.
The minimum program and erase times shown in
Table B-5
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.
B.5.1.1 Single Word Programming
The programming time for single word programming is dependent on the bus frequency as a well as on
the frequency f¨
NVMOP
and can be calculated according to the following formula.
t
swpgm
9
f
NVMOP
B.5.1.2 Row Programming
Flash programming where up to 32 words in a row can be programmed consecutively by keeping 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.
B.5.1.3 Sector Erase
Erasing a 512 byte Flash sector takes:
The setup times can be ignored for this operation.
--------1
25
1
f
bus
----------
+
=
t
bwpgm
4
1
f
NVMOP
---------------------
9
1
f
bus
----------
+
=
t
brpgm
t
swpgm
31 t
bwpgm
+
=
t
era
4000
1
f
NVMOP
---------------------
≈
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC9S12E64MFUE 功能描述:16位微控制器 - MCU MORAY EEL RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時鐘頻率:24 MHz 程序存儲器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風格:SMD/SMT
MC9S12E64MPV 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Freescale Semiconductor 功能描述:
MC9S12E64MPVE 功能描述:16位微控制器 - MCU MORAY EEL RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時鐘頻率:24 MHz 程序存儲器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風格:SMD/SMT
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MC9S12G128MLH 制造商:Freescale Semiconductor 功能描述:MC9S12G128MLH - Bulk
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