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参数资料
| 型号： | MC68HC08GP8AMFB |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 8.2 MHz, MICROCONTROLLER, PQFP44 |
| 封装： | PLASTIC, QFP-44 |
| 文件页数： | 45/126页 |
| 文件大小： | 4243K |
| 代理商： | MC68HC08GP8AMFB |
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General Description
Pin Functions
MC68HC08GP8A
Data Sheet
MOTOROLA
General Description
25
1.5.4 External Interrupt Pin (IRQ)
IRQ is an asynchronous external interrupt pin. This pin contains an internal pullup
resistor. See Section 7. External Interrupt (IRQ).
1.5.5 CGM Power Supply Pins (VDDA and VSSA)
VDDA and VSSA are the power supply pins for the analog portion of the clock
generator module (CGM). Connect the VDDA pin to the same voltage potential as
VDD, and the VSSA pin to the same voltage potential as VSS. Decoupling of these
pins should be as per the digital supply. See Section 4. Clock Generator Module
1.5.6 External Filter Capacitor Pin (CGMXFC)
CGMXFC is an external filter capacitor connection for the CGM. See Section 4.
1.5.7 ADC Power Supply/Reference Pins (VDDAD/VREFH and VSSAD/VREFL)
VDDAD and VSSAD are the power supply pins for the analog-to-digital converter
(ADC). Connect the VDDAD pin to the same voltage potential as VDD, and the
VSSAD pin to the same voltage potential as VSS. Decoupling of these pins should
be as per the digital supply. See Section 3. Analog-to-Digital Converter (ADC).
VREFH is the high reference supply for the ADC, and is internally connected to
VDDAD. VREFL is the low reference supply for the ADC, and is internally connected
to VSSAD.
1.5.8 Port A Input/Output (I/O) Pins (PTA7/KBD7–PTA0/KBD0)
PTA7–PTA0 are general-purpose, bidirectional I/O port pins. Any or all of the port
A pins can be programmed to serve as keyboard interrupt pins. See Section 12.
These port pins also have selectable pullups when configured for input mode. The
pullups are disengaged when configured for output mode. The pullups are
selectable on an individual port bit basis.
1.5.9 Port B I/O Pins (PTB7/AD7–PTB0/AD0)
PTB7–PTB0 are general-purpose, bidirectional I/O port pins that can also be used
for analog-to-digital converter (ADC) inputs. See Section 12. Input/Output Ports
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