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MC68HC08AS32A Datasheet(PDF) 25 Page - Motorola, Inc

No. de Pieza. MC68HC08AS32A
Descripción  Microcontrollers
Descarga  296 Pages
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Fabricante  MOTOROLA [Motorola, Inc]
Página de inicio  http://www.freescale.com
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MC68HC08AS32A Datasheet(HTML) 25 Page - Motorola, Inc

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General Description
Pin Assignments
MC68HC08AS32A — Rev. 1
Data Sheet
MOTOROLA
General Description
25
1.4.6 ADC High Reference Pin (VREFH)
VREFH is the high reference voltage for all analog-to-digital conversions. (See
Section 3. Analog-to-Digital Converter (ADC).)
1.4.7 Analog Ground Pin (VSSA/VREFL)
The VSSA/VREFL analog ground pin is used only for the ground connections for the
analog sections of the circuit and should be decoupled as per the VSS digital
ground pin. The analog sections consist of a clock generator module (CGM) and
an analog-to-digital converter (ADC). VSSA/VREFL is also the lower reference
supply for the ADC. (See Section 5. Clock Generator Module (CGM) and
Section 3. Analog-to-Digital Converter (ADC).)
1.4.8 External Filter Capacitor Pin (CGMXFC)
CGMXFC is an external filter capacitor connection for the CGM. (See Section 5.
Clock Generator Module (CGM).)
1.4.9 Port A Input/Output (I/O) Pins (PTA7–PTA0)
PTA7–PTA0 are general-purpose bidirectional I/O port pins. (See Section 12.
Input/Output (I/O) Ports.)
1.4.10 Port B I/O Pins (PTB7/ATD7–PTB0/ATD0)
Port B is an 8-bit special function port that shares all eight pins with the
analog-to-digital converter (ADC). (See Section 3. Analog-to-Digital Converter
(ADC) and Section 12. Input/Output (I/O) Ports.)
1.4.11 Port C I/O Pins (PTC4–PTC0)
PTC4–PTC3 and PTC1–PTC0 are general-purpose bidirectional I/O port pins.
PTC2/MCLK is a special function port that shares its pin with the system clock.
(See Section 12. Input/Output (I/O) Ports.)
1.4.12 Port D I/O Pins (PTD6/ATD14/TCLKA–PTD0/ATD8)
Port D is a 7-bit special function port that shares all of its pins with the
analog-to-digital converter module (ADC) and one of its pins with the timer
interface module (TIM). (See Section 16. Timer Interface (TIM), Section 3.
Analog-to-Digital Converter (ADC), and Section 12. Input/Output (I/O) Ports.)
1.4.13 Port E I/O Pins (PTE7/SPSCK–PTE0/TxD)
Port E is an 8-bit special function port that shares two of its pins with the timer
interface module (TIM), four of its pins with the serial peripheral interface module
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com


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