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MC68HC08AS32A Datasheet(PDF) 24 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) 24 Page - Motorola, Inc

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General Description
Data Sheet
MC68HC08AS32A — Rev. 1
24
General Description
MOTOROLA
Figure 1-4. Power Supply Bypassing
VSS is also the ground for the port output buffers and the ground return for the serial
clock in the serial peripheral interface module (SPI). (See Section 15. Serial
Peripheral Interface (SPI).)
NOTE:
VSS must be grounded for proper MCU operation.
1.4.2 Oscillator Pins (OSC1 and OSC2)
The OSC1 and OSC2 pins are the connections for the on-chip oscillator circuit.
(See Section 5. Clock Generator Module (CGM).)
1.4.3 External Reset Pin (RST)
A logic 0 on the RST pin forces the MCU to a known startup state. RST is
bidirectional, allowing a reset of the entire system. It is driven low when any internal
reset source is asserted. (See Section 14. System Integration Module (SIM) for
more information.)
1.4.4 External Interrupt Pin (IRQ)
IRQ is an asynchronous external interrupt pin. (See Section 8. External Interrupt
(IRQ).)
1.4.5 Analog Power Supply Pin (VDDA/VDDAREF)
VDDA/VDDAREF is the power supply pin for the analog portion of the chip. These
modules are the analog-to-digital converter (ADC) and the clock generator module
(CGM). (See Section 5. Clock Generator Module (CGM) and Section 3.
Analog-to-Digital Converter (ADC).)
MCU
VDD
C2
C1
0.1
µF
VSS
VDD
+
NOTE: Component values shown represent typical applications.
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com


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