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参数资料
| 型号： | MC68HC05RC8DW |
| 厂商： | MOTOROLA INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28 |
| 封装： | SOIC-28 |
| 文件页数： | 39/122页 |
| 文件大小： | 445K |
| 代理商： | MC68HC05RC8DW |
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General Description
Signal Description
MC68HC05RC16 — Rev. 3.0
General Release Specification
MOTOROLA
General Description
23
1.5.1 VDD and VSS
Power is supplied to the microcontroller’s digital circuits using these two
pins. V
DD is the positive supply and VSS is ground.
1.5.2 IRQ (Maskable Interrupt Request)
In addition to suppling the EPROM with the required programming
voltage, this pin has a mask option as specified by the user that provides
one of two different choices of interrupt triggering sensitivity. The options
are:
1. Negative edge-sensitive triggering only
2. Both negative edge-sensitive and level-sensitive triggering.
The MCU completes the current instruction before it responds to the
interrupt request. When IRQ goes low for at least one t
ILIH (see 11.8
Control Timing (5.0 Vdc and 2.2 Vdc)), a logic 1 is latched internally to
signify that an interrupt has been requested. When the MCU completes
its current instruction, the interrupt latch is tested. If the interrupt latch
contains a logic 1 and the interrupt mask bit (I bit) in the condition code
register is clear, the MCU then begins the interrupt sequence.
If the option is selected to include level-sensitive triggering, the IRQ input
requires an external resistor to V
DD for wired-OR operation.
The IRQ pin contains an internal Schmitt trigger as part of its input to
improve noise immunity.
Refer to Section 4. Interrupts for more detail.
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相关代理商/技术参数 |
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| MC68HC05RC8FN | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:General Release Specification |
| MC68HC05RC8P | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:General Release Specification |
| MC68HC05SC24 | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:Secure 8-bit microcomputer with EEPROM |
| MC68HC05SR3 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcontroller Units |
| MC68HC05SU3A | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Fully static chip design featuring the industry standard 8-bit M68HC05 core |
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