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參數(shù)資料
| 型號： | MC68HC05P4ADW |
| 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, PDSO28 |
| 封裝： | SOIC-28 |
| 文件頁數(shù)： | 7/72頁 |
| 文件大?。?/td> | 400K |
| 代理商： | MC68HC05P4ADW |
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Signal Description
MC68HC05P4A Data Sheet, Rev. 7.1
Freescale Semiconductor
15
1.6.4 RESET
This active low pin is used to reset the MCU to a known startup state by pulling RESET low. The RESET
pin contains an internal Schmitt trigger as part of its input to improve noise immunity.
1.6.5 TCMP
This pin provides an output for the output compare feature of the on-chip timer system.
1.6.6 PA0–PA7
Port A is an 8-bit bidirectional port which does not share any of its pins with other subsystems. The port
A data register is at $0000, and the data direction register is at $0004. Reset does not affect the data
registers, but clears the data direction registers, thereby returning the ports to inputs. Writing a 1 to a data
direction register (DDR) bit sets the corresponding port bit to output mode. Port A has mask option
enabled pullup devices and interrupt capability by pin. For a detailed description of I/O programming, refer
Figure 1-3. Port A Pullup Option
1.6.7 SDO/PB5, SDI/PB6, and SCK/PB7
Port B is a 3-bit bidirectional port. These pins are shared with the SIOP subsystem. Refer to Chapter 7
Simple Serial Input/Output Port (SIOP) for a detailed description of the SIOP. The address of the port B
data register is $0001, and the data direction register is at address $0005. Reset does not affect the data
registers, but clears the data direction registers, thereby returning the ports to inputs. Writing a 1 to a DDR
bit sets the corresponding port bit to output mode.
1.6.8 PC0–PC7
Port C is an 8-bit bidirectional port which does not share any of its pins with other subsystems. The
address of the port C data register is $0002, and the DDR is at address $0006. Reset does not affect the
data registers, but clears the data direction registers, thereby returning the ports to inputs. Writing a 1 to
a DDR bit sets the corresponding port bit to output mode. Two of the port C pins, PC0 and PC1, have a
higher current drive capability. See Chapter 12 Electrical Specifications.
PA0
VDD
DDR BIT
NORMAL PORT
FROM ALL OTHER PORT A PINS
IRQ
SCHMITT
TRIGGER
TO INTERRUPT
LOGIC
MASK OPTION
CIRCUITRY
相關PDF資料 |
PDF描述 |
|---|---|
| MC68HC05P6VS | 8-BIT, 2.1 MHz, MICROCONTROLLER, CDIP28 |
| MC68HC05P6CS | 8-BIT, 2.1 MHz, MICROCONTROLLER, CDIP28 |
| MC68HC05P6VP | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP28 |
| MC68HC05P6CDW | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28 |
| MC68HC05P6DW | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC05P4DW | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC05P4P | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC05P6 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC05P6_1 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC05P8 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
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