2.3 Power Supply (VDD
鍙冩暩璩囨枡
鍨嬭櫉锛� MC68HC11K1CFN4
寤犲晢锛� Freescale Semiconductor
鏂囦欢闋佹暩锛� 221/290闋�
鏂囦欢澶у皬锛� 0K
鎻忚堪锛� IC MCU 640 EEPROM 4MHZ 84-PLCC
妯欐簴鍖呰锛� 15
绯诲垪锛� HC11
鏍稿績铏曠悊鍣細 HC11
鑺珨灏哄锛� 8-浣�
閫熷害锛� 4MHz
閫i€氭€э細 SCI锛孲PI
澶栧湇瑷倷锛� POR锛孭WM锛學DT
杓稿叆/杓稿嚭鏁革細 37
绋嬪簭瀛樺劜鍣ㄩ鍨嬶細 ROMless
EEPROM 澶у皬锛� 640 x 8
RAM 瀹归噺锛� 768 x 8
闆诲 - 闆绘簮 (Vcc/Vdd)锛� 4.5 V ~ 5.5 V
鏁告摎杞夋彌鍣細 A/D 8x8b
鎸暕鍣ㄥ瀷锛� 鍏ч儴
宸ヤ綔婧害锛� -40°C ~ 85°C
灏佽/澶栨锛� 84-LCC锛圝 褰㈠紩绶氾級
鍖呰锛� 绠′欢
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Technical Data
M68HC11K Family
36
Pin Description
MOTOROLA
Pin Description
2.3 Power Supply (VDD, VSS, AVDD, and AVSS)
The MCU operates from a single 5-volt (nominal) power supply. VDD is
the positive power input and VSS is ground. There are three VDD/VSS
pairs of pins on the K series devices and two sets on the KS devices. All
devices contain a separate pair of power inputs, AVDD and AVSS, for the
analog-to-digital (A/D) converter, so that the A/D circuitry can be
bypassed independently.
Very fast signal transitions occur on the MCU pins. The short rise and fall
times place high, short duration current demands on the power supply.
To prevent noise problems, provide good power supply bypassing at the
MCU. Also, use bypass capacitors that have good high-frequency
characteristics and situate them as close to the MCU as possible.
Bypass requirements vary, depending on how heavily the MCU pins are
loaded.
2.4 Reset (RESET)
This active-low, bidirectional control signal acts as an input to initialize
the MCU to a known start-up state. It also serves as an open-drain
output to indicate that an internal failure has been detected in either the
clock monitor or computer operating properly (COP) watchdog circuit.
The CPU distinguishes between internal and external reset conditions
by counting the number of E-clock cycles that occur between the start of
reset and the presence of a logic 1 voltage level on the reset pin. Less
than two cycles indicates an internal reset; greater than two, an external
reset. To prevent the device from misinterpreting the kind of reset that
occurs, do not connect an external resistor-capacitor (RC) power-up
delay circuit directly to the reset pin.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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MC68HC11K1CFNE4 鍔熻兘鎻忚堪:8浣嶅井鎺у埗鍣� -MCU 8B MCU 768 RAM - EPP RoHS:鍚� 鍒堕€犲晢:Silicon Labs 鏍稿績:8051 铏曠悊鍣ㄧ郴鍒�:C8051F39x 鏁告摎绺界窔瀵害:8 bit 鏈€澶ф檪閻橀牷鐜�:50 MHz 绋嬪簭瀛樺劜鍣ㄥぇ灏�:16 KB 鏁告摎 RAM 澶у皬:1 KB 鐗囦笂 ADC:Yes 宸ヤ綔闆绘簮闆诲:1.8 V to 3.6 V 宸ヤ綔婧害鑼冨湇:- 40 C to + 105 C 灏佽 / 绠遍珨:QFN-20 瀹夎棰ㄦ牸:SMD/SMT
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MC68HC11K1CFU2 鍒堕€犲晢:MOTOROLA 鍒堕€犲晢鍏ㄧū:Motorola, Inc 鍔熻兘鎻忚堪:8-Bit Microcontroller