參數(shù)資料
型號： MC68HC705J1AVDW
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： Microcontrollers
中文描述： 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO20
封裝： SOIC-20
文件頁數(shù)： 19/108頁
文件大?。?/td> 718K
代理商： MC68HC705J1AVDW
Pin Functions
MC68HC705KJ1 MC68HRC705KJ1 MC68HLC705KJ1 Data Sheet, Rev. 4.1
Freescale Semiconductor
19
1.4.2.4 External Clock
An external clock from another CMOS-compatible device can be connected to the OSC1 input, with the
OSC2 input not connected, as shown in
Figure 1-8
. This configuration is possible regardless of whether
the crystal/ceramic resonator or the RC oscillator is enabled.
Figure 1-8. External Clock Connections
1.4.3 RESET
Applying a logic 0 to the RESET pin forces the MCU to a known startup state. An internal reset also pulls
the RESET pin low. An internal resistor to V
DD
pulls the RESET pin high. A steering diode between the
RESET and V
DD
pins discharges any RESET pin voltage when power is removed from the MCU. The
RESET pin contains an internal Schmitt trigger to improve its noise immunity as an input. Refer to
Chapter 8 Resets and Interrupts
for more information.
1.4.4 IRQ/V
PP
The external interrupt/programming voltage pin (IRQ/V
PP
) drives the asynchronous IRQ interrupt function
of the CPU. Additionally, it is used to program the user EPROM and mask option register. (See
Chapter 2 Memory
and
Chapter 5 External Interrupt Module (IRQ)
.)
The LEVEL bit in the mask option register provides negative edge-sensitive triggering or both negative
edge-sensitive and low level-sensitive triggering for the interrupt function.
If level-sensitive triggering is selected, the IRQ/V
PP
input requires an external resistor to V
DD
for wired-OR
operation. If the IRQ/V
PP
pin is not used, it must be tied to the V
DD
supply.
The IRQ/V
PP
pin contains an internal Schmitt trigger as part of its input to improve noise immunity. The
voltage on this pin should not exceed V
DD
except when the pin is being used for programming the
EPROM.
NOTE
The mask option register can enable the PA0
–
PA3
pins to function as
external interrupt pins.
1.4.5 PA0–PA7
These eight input/output (I/O) lines comprise port A, a general-purpose bidirectional I/O port. (See
Chapter 5 External Interrupt Module (IRQ)
for information on PA0–PA3 external interrupts.)
1.4.6 PB2 and PB3
These two I/O lines comprise port B, a general-purpose bidirectional I/O port.
MCU
EXTERNAL
CMOS CLOCK
O
O
相關PDF資料
PDF描述
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相關代理商/技術參數(shù)
參數(shù)描述
MC68HC705J2CDW 制造商:Motorola Inc 功能描述: 制造商:Motorola Inc 功能描述:MicroController, 8-Bit, 20 Pin, Plastic, SOP
MC68HC705J2DW 制造商:Motorola Inc 功能描述:
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MC68HC705JJ7CDW 功能描述:IC MCU 8BIT 20-SOIC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:HC05 其它有關文件:STM32F101T8 View All Specifications 特色產品:STM32 32-bit Cortex MCUs 標準包裝:490 系列:STM32 F1 核心處理器:ARM? Cortex?-M3 芯體尺寸:32-位 速度:36MHz 連通性:I²C，IrDA，LIN，SPI，UART/USART 外圍設備:DMA，PDR，POR，PVD，PWM，溫度傳感器，WDT 輸入/輸出數(shù):26 程序存儲器容量:64KB（64K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):2 V ~ 3.6 V 數(shù)據(jù)轉換器:A/D 10x12b 振蕩器型:內部 工作溫度:-40°C ~ 85°C 封裝/外殼:36-VFQFN，36-VFQFPN 包裝:托盤 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名稱:497-9032STM32F101T8U6-ND
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