參數(shù)資料
型號： MC68HC05J3DW
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO20
封裝： PLASTIC, SOIC-20
文件頁數(shù)： 15/92頁
文件大?。?/td> 912K
代理商： MC68HC05J3DW
MOTOROLA
2-6
MC68HC05J3
MODES OF OPERATION AND PIN DESCRIPTIONS
2
2.2.3.4
External clock
An external clock should be applied to the OSC1 input, with the OSC2 pin left unconnected, as
shown in Figure 2-3(d). The tOXOV specication (see Table 9-5 and Table 9-6) does not apply
when using an external clock input. The equivalent specication of the external clock source
should be used in lieu of tOXOV.
2.2.4
RESET
This active low input-only pin is used to reset the MCU. Applying a logic zero to this pin forces the
device to a known start-up state. An external RC-circuit can be connected to this pin to generate
a power-on-reset (POR) if required. In this case, the time constant must be great enough to allow
the oscillator circuit to stabilise. This input has an internal Schmitt trigger to improve noise
immunity.
2.2.5
PA0–PA7
These 8 I/O lines comprise ports A. The state of any pin is software programmable, and all the
pins are congured as inputs during power-on or reset.
2.2.6
PB0–PB5
These six pins comprise port B. The state of any pin is software programmable, and all the pins
are congured as inputs during power-on or reset. In addition to their normal I/O functions, pins
PB0–PB3 can be used to generate a keyboard interrupt when congured as an input while PB4
is shared with the output compare function (TCMP) of the programmable timer and PB5 with the
input capture function (TCAP) (see Section 4.3). PB0–PB5 contain an internal Schmitt trigger as
part of their input to improve noise immunity.
TPG
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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相關PDF資料
PDF描述
MC68HC05J3CDW 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO20
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相關代理商/技術參數(shù)
參數(shù)描述
MC68HC05J3P 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit
MC68HC05J5A 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:8-bit microcontroller units
MC68HC05J5ADW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:8-bit microcontroller units
MC68HC05J5AJDW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:8-bit microcontroller units
MC68HC05J5AJP 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:8-bit microcontroller units
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