Details

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BUY MC68705R3P https://www.utsource.net/itm/p/12606963.html

Parameter	Description	Min	Typ	Max	Unit
VCC	Supply Voltage	4.75	5.0	5.25	V
ICC	Supply Current (Active Mode)	-	-	100	mA
fosc	Oscillator Frequency	1.0	-	10.0	MHz
TA	Operating Temperature Range	-40	-	85	掳C
TSTG	Storage Temperature Range	-55	-	150	掳C
II/O	I/O Pin Current	-10	-	10	mA
VIH	Input High Voltage	2.0	-	VCC	V
VIL	Input Low Voltage	0	-	0.8	V
VOH	Output High Voltage	2.4	-	VCC - 0.4	V
VOL	Output Low Voltage	0	-	0.4	V
tpd	Propagation Delay Time	0.1	-	0.5	渭s
tr	Rise Time	0.1	-	0.5	渭s
tf	Fall Time	0.1	-	0.5	渭s

Instructions for Using MC68705R3P

1. Power Supply:

   • Ensure the supply voltage (V_CC) is within the range of 4.75V to 5.25V.
   • Connect the ground (GND) pin to a stable reference point.

2. Oscillator Configuration:

   • The MC68705R3P supports external crystal or ceramic resonators for clock generation.
   • For crystal oscillators, connect the crystal between the XTAL1 and XTAL2 pins.
   • For ceramic resonators, use appropriate load capacitors as specified in the datasheet.

3. I/O Pins:

   • I/O pins can source or sink up to 10mA of current.
   • Ensure input voltages do not exceed V_CC or go below 0V.
   • Use pull-up or pull-down resistors as needed to ensure proper logic levels.

4. Temperature Considerations:

   • The operating temperature range is -40掳C to 85掳C.
   • Store the device in an environment with temperatures ranging from -55掳C to 150掳C.

5. Programming:

   • Use an appropriate programmer to load the microcontroller with the desired firmware.
   • Follow the programming guidelines provided in the datasheet to avoid damage.

6. Reset and Initialization:

   • Apply a reset signal to the RST pin to initialize the microcontroller.
   • Ensure the reset pulse is held long enough to allow the internal circuitry to stabilize.

7. Interrupt Handling:

   • Configure interrupt sources and vectors according to the application requirements.
   • Enable interrupts using the appropriate control registers.

8. Power-On Reset (POR):

   • The MC68705R3P includes a built-in POR circuit that initializes the microcontroller when power is applied.
   • Ensure the power supply ramp-up time is within the specified limits to prevent improper initialization.

9. Low Power Modes:

   • Utilize low power modes such as idle and stop to reduce power consumption.
   • Transition to these modes using the appropriate control instructions.

10. Debugging and Testing:

    • Use in-circuit debugging tools to monitor and test the microcontroller during development.
    • Verify the functionality of all I/O pins and internal peripherals.

By following these instructions, you can effectively use the MC68705R3P microcontroller in your applications.

(For reference only)