Consider the following example for fSYS
鍙冩暩(sh霉)璩囨枡
鍨嬭櫉(h脿o)锛� MCF5280CVM80J
寤犲晢锛� Freescale Semiconductor
鏂囦欢闋�(y猫)鏁�(sh霉)锛� 36/766闋�(y猫)
鏂囦欢澶�?銆�?/td> 0K
鎻忚堪锛� IC MPU RISC 80MHZ 256-MAPBGA
妯�(bi膩o)婧�(zh菙n)鍖呰锛� 90
绯诲垪锛� MCF528x
鏍稿績铏曠悊鍣細 Coldfire V2
鑺珨灏哄锛� 32-浣�
閫熷害锛� 80MHz
閫i€氭€э細 CAN锛孍BI/EMI锛屼互澶恫(w菐ng)锛孖²C锛孲PI锛孶ART/USART
澶栧湇瑷�(sh猫)鍌欙細 DMA锛孡VD锛孭OR锛孭WM锛學DT
杓稿叆/杓稿嚭鏁�(sh霉)锛� 150
绋嬪簭瀛樺劜(ch菙)鍣ㄩ鍨嬶細 ROMless
RAM 瀹归噺锛� 64K x 8
闆诲 - 闆绘簮 (Vcc/Vdd)锛� 2.7 V ~ 3.6 V
鏁�(sh霉)鎿�(j霉)杞�(zhu菐n)鎻涘櫒锛� A/D 8x10b
鎸暕鍣ㄥ瀷锛� 澶栭儴
宸ヤ綔婧害锛� -40°C ~ 85°C
灏佽/澶栨锛� 256-LBGA
鍖呰锛� 鎵樼洡
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ColdFire Flash Module (CFM)
6-18
Freescale Semiconductor
Consider the following example for fSYS = 66 MHz:
So, for fSYS = 66 MHz, writing 0x54 to CFMCLKD will set fCLK to 196.43 kHz which is a valid frequency
for the timing of program and erase operations.
WARNING
For proper program and erase operations, it is critical to set fCLK between
150 kHz and 200 kHz. Array damage due to overstress can occur when fCLK
is less than 150 kHz. Incomplete programming and erasure can occur when
fCLK is greater than 200 kHz.
NOTE
Command execution time increases proportionally with the period of fCLK.
When CFMCLKD is written, the DIVLD bit is set automatically. If DIVLD is 0, CFMCLKD has not been
written since the last reset. Program and erase commands will not execute if this register has not been
6.4.3.2
Program, Erase, and Verify Sequences
A command state machine is used to supervise the write sequencing of program, erase, and verify
commands. To prepare for a command, the CFMUSTAT[CBEIF] flag should be tested to ensure that the
address, data, and command buffers are empty. If CBEIF is set, the command write sequence can be
started.
This three-step command write sequence must be strictly followed. No intermediate writes to the CFM
module are permitted between these three steps. The command write sequence is:
1. Write the 32-bit longword to be programmed to its location in the CFM array. The address and data
will be stored in internal buffers. All address bits are valid for program commands. The value of
the data written for verify and erase commands is ignored. For mass erase or verify, the address can
be any location in the CFM array. For page erase, address bits [9:0] are ignored.
fSYS
2 x (DIV[5:0] + 1) x (1 + (PRDIV8 x 7))
fCLK =
fSYS
2 x 200kHz x (1 + (PRDIV8 x 7))
DIV[5:0] =
66 MHz
400 kHz x (1 + (1 x 7))
=
= 20
fSYS
2 x (DIV[5:0] + 1) x (1 + (PRDIV8 x 7))
fCLK =
66 MHz
2 x (20 + 1) x (1 + (1 x 7))
=
= 196.43 kHz
MCF5282 and MCF5216 ColdFire Microcontroller User鈥檚 Manual, Rev. 3
鐩搁棞(gu膩n)PDF璩囨枡
PDF鎻忚堪
VI-214-CV-S CONVERTER MOD DC/DC 48V 150W
VE-2WX-CV-S CONVERTER MOD DC/DC 5.2V 150W
VE-2W0-CV-S CONVERTER MOD DC/DC 5V 150W
VE-21H-CV-S CONVERTER MOD DC/DC 52V 150W
JBXFD0G06MSSDPMR CONN PLUG 6POS STRAIGHT SOLDER
鐩搁棞(gu膩n)浠g悊鍟�/鎶€琛�(sh霉)鍙冩暩(sh霉)
鍙冩暩(sh霉)鎻忚堪
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MCF5281CVF80 鍔熻兘鎻忚堪:IC MPU 32BIT COLDF 256-MAPBGA RoHS:鍚� 椤炲垾:闆嗘垚闆昏矾 (IC) >> 宓屽叆寮� - 寰帶鍒跺櫒锛� 绯诲垪:MCF528x 妯�(bi膩o)婧�(zh菙n)鍖呰:250 绯诲垪:56F8xxx 鏍稿績铏曠悊鍣�:56800E 鑺珨灏哄:16-浣� 閫熷害:60MHz 閫i€氭€�:CAN锛孲CI锛孲PI 澶栧湇瑷�(sh猫)鍌�:POR锛孭WM锛屾韩搴﹀偝鎰熷櫒锛學DT 杓稿叆/杓稿嚭鏁�(sh霉):21 绋嬪簭瀛樺劜(ch菙)鍣ㄥ閲�:40KB锛�20K x 16锛� 绋嬪簭瀛樺劜(ch菙)鍣ㄩ鍨�:闁冨瓨 EEPROM 澶у皬:- RAM 瀹归噺:6K x 16 闆诲 - 闆绘簮 (Vcc/Vdd):2.25 V ~ 3.6 V 鏁�(sh霉)鎿�(j霉)杞�(zhu菐n)鎻涘櫒:A/D 6x12b 鎸暕鍣ㄥ瀷:鍏�(n猫i)閮� 宸ヤ綔婧害:-40°C ~ 125°C 灏佽/澶栨:48-LQFP 鍖呰:鎵樼洡 閰嶇敤:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323
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MCF5281CVM66J 鍔熻兘鎻忚堪:32浣嶅井鎺у埗鍣� - MCU V2CORE 256K FLASH RoHS:鍚� 鍒堕€犲晢:Texas Instruments 鏍稿績:C28x 铏曠悊鍣ㄧ郴鍒�:TMS320F28x 鏁�(sh霉)鎿�(j霉)绺界窔瀵害:32 bit 鏈€澶ф檪(sh铆)閻橀牷鐜�:90 MHz 绋嬪簭瀛樺劜(ch菙)鍣ㄥぇ灏�:64 KB 鏁�(sh霉)鎿�(j霉) RAM 澶у皬:26 KB 鐗囦笂 ADC:Yes 宸ヤ綔闆绘簮闆诲:2.97 V to 3.63 V 宸ヤ綔婧害鑼冨湇:- 40 C to + 105 C 灏佽 / 绠遍珨:LQFP-80 瀹夎棰�(f膿ng)鏍�:SMD/SMT
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