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| 型号： | MC68HCP11A1CFNE3 |
| 厂商： | MOTOROLA INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, EEPROM, 3 MHz, MICROCONTROLLER, PQCC52 |
| 封装： | PLASTIC, LCC-52 |
| 文件页数： | 68/158页 |
| 文件大小： | 776K |
| 代理商： | MC68HCP11A1CFNE3 |
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MC68HC11A8
SIGNAL DESCRIPTIONS AND OPERATING MODES
MOTOROLA
TECHNICAL DATA
2-1
2
2 SIGNAL DESCRIPTIONS AND OPERATING MODES
The signal descriptions and operating modes are presented in this section. When the
microcontroller is in an expanded multiplexed operating mode, 18 pins change func-
tion to support a multiplexed address/data bus.
2.1 Signal Pin Descriptions
The following paragraphs provide a description of the input/output signals. Reference
is made, where applicable, to other sections that contain more detail about the function
being performed.
2.1.1 Input Power (VDD) and Ground (VSS)
Power is supplied to the microcontroller using these pins. VDD is the positive power in-
put and VSS is ground. Although the MC68HC11A8 is a CMOS device, very fast signal
transitions are present on many of its pins. Short rise and fall times are present even
when the microcontroller is operating at slow clock rates. Special care must be taken
to provide good power supply bypassing at the MCU. Recommended bypassing would
include a 0.1
F ceramic capacitor between the V
DD and VSS pins and physically adja-
cent to one of the two pins. A bulk capacitance, whose size depends on the other cir-
cuitry in the system, should also be present on the circuit board.
2.1.2 Reset (RESET)
This active low bidirectional control signal is used as an input to initialize the
MC68HC11A8 to a known start-up state, and 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. This reset signal is significantly different from the re-
set signal used on other Motorola MCUs. Please refer to 9 RESETS, INTERRUPTS,
AND LOW POWER MODES before designing circuitry to generate or monitor this sig-
nal.
2.1.3 Crystal Driver and External Clock Input (XTAL, EXTAL)
These two pins provide the interface for either a crystal or a CMOS compatible clock
to control the internal clock generator circuitry. The frequency applied to these pins
shall be four times higher than the desired E clock rate. The XTAL pin is normally left
unterminated when using an external CMOS compatible clock input to the EXTAL pin.
However, a 10K to 100K load resistor to ground may be used to reduce RFI noise
emission. The XTAL output is normally intended to drive only a crystal.
The XTAL output may be buffered with a high-input-impedance buffer such as the
74HC04, or it may be used to drive the EXTAL input of another M68HC11.
In all cases take extra care in the circuit board layout around the oscillator pins. Load
capacitances shown in the oscillator circuits include all stray layout capacitances. Re-
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| MC68HCP11A1FN | 制造商:MOTORALA 功能描述: |
| MC68HCP11E0CP2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC68HCP11E0FN | 功能描述:MICROCONTROLLER MCU 8ADC 3MHC RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:HC11 标准包装:250 系列:56F8xxx 核心处理器:56800E 芯体尺寸:16-位 速度:60MHz 连通性:CAN，SCI，SPI 外围设备:POR，PWM，温度传感器，WDT 输入/输出数:21 程序存储器容量:40KB（20K x 16） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:6K x 16 电压 - 电源 (Vcc/Vdd):2.25 V ~ 3.6 V 数据转换器:A/D 6x12b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:48-LQFP 包装:托盘 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323 |
| MC68HCP11E0FNE | 功能描述:8位微控制器 -MCU 8B MCU 512RAM COP A/D RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| MC68HCP11E1CFNE2 | 功能描述:8位微控制器 -MCU 8B MCU 512 BYTES RAM RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
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