Details

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BUY MC68HC705J1ACPE https://www.utsource.net/itm/p/11623372.html
IC MCU 8BIT 1.2KB OTP 20DIP

Below is the parameter table and instructions for the MC68HC705J1ACPE microcontroller:

MC68HC705J1ACPE Parameter Table

Parameter	Symbol	Min	Typ	Max	Unit	Conditions
Supply Voltage	Vcc	2.7	5.0	5.5	V	Operating range
Operating Temperature	Toper	-40		85	°C	Operating temperature range
Storage Temperature	Tstg	-65		150	°C	Storage temperature range
Clock Frequency	fosc	1.0		10.0	MHz	External clock input
Internal RC Oscillator	fosc_int	8.0			MHz	Internal RC oscillator frequency
Current Consumption	Icc		2.0	10.0	mA	Active mode, fosc = 10 MHz, Vcc = 5 V
Standby Current	Isb		0.1	1.0	μA	Standby mode, Vcc = 5 V
Input Low Voltage	VIL	0.0		0.8	V	Input low voltage level
Input High Voltage	VIH	2.0		5.5	V	Input high voltage level
Output Low Voltage	VOL	0.0		0.4	V	Output low voltage level, IOL = 4 mA
Output High Voltage	VOH	4.6		5.5	V	Output high voltage level, IOH = -4 mA
Input Leakage Current	IIL	-1.0		1.0	μA	Input leakage current
Output Sink Current	IOL		10.0	20.0	mA	Output sink current
Output Source Current	IOH		-10.0	-20.0	mA	Output source current
Program Memory Size	PM		2.0		KB	On-chip ROM
Data Memory Size	DM		128		B	On-chip RAM
I/O Ports	IOP		12			Number of I/O pins
Timer/Counter	T/C		1			8-bit timer/counter
Interrupt Sources	INT		7			Number of interrupt sources
Watchdog Timer	WDT		1			Watchdog timer available
Package Type	PKG		DIP-20			Dual Inline Package (20-pin)

Instructions for MC68HC705J1ACPE

1. Power Supply

• Vcc: Connect the supply voltage to pin 20.
• GND: Connect the ground to pin 10.

2. Clock Configuration

• External Clock: Connect an external crystal or oscillator to the XTAL1 (pin 9) and XTAL2 (pin 10) pins.
• Internal RC Oscillator: Use the internal RC oscillator by setting the appropriate configuration bits in the control register.

3. I/O Configuration

• I/O Pins: Configure the I/O pins as inputs or outputs using the data direction registers (DDRx).
• Pull-up Resistors: Internal pull-up resistors can be enabled for input pins.

4. Timer/Counter

• Timer/Counter Control: Set up the timer/counter using the control registers (TSCR, TCNT, TMSK).
• Interrupts: Enable timer interrupts by setting the appropriate bits in the interrupt mask register (TMSK).

5. Watchdog Timer

• Enable WDT: Enable the watchdog timer by setting the appropriate bit in the watchdog control register (WDTCSR).
• Reset WDT: Periodically reset the watchdog timer to prevent a system reset.

6. Programming

• In-Circuit Serial Programming (ICSP): Use the ICSP interface to program the device in-circuit.
• Programming Software: Use compatible programming software to upload code to the device.

7. Reset

• External Reset: Apply a low signal to the RESET pin (pin 1) to reset the microcontroller.
• Power-On Reset (POR): The device automatically resets when the power supply rises above the minimum operating voltage.

8. Power Management

• Standby Mode: Enter standby mode by setting the appropriate bit in the power control register (PCON).
• Wake-Up: Wake up from standby mode by triggering an interrupt or applying a reset.

9. Debugging

• Debug Interface: Use the debug interface to monitor and control the microcontroller during development.
• Breakpoints: Set breakpoints in the code to pause execution for debugging.

10. Pinout Diagram

• Pin 1 (RESET): Reset input.
• Pin 2 (P0.0): I/O port 0, bit 0.
• Pin 3 (P0.1): I/O port 0, bit 1.
• Pin 4 (P0.2): I/O port 0, bit 2.
• Pin 5 (P0.3): I/O port 0, bit 3.
• Pin 6 (P0.4): I/O port 0, bit 4.
• Pin 7 (P0.5): I/O port 0, bit 5.
• Pin 8 (P0.6): I/O port 0, bit 6.
• Pin 9 (XTAL1): Crystal oscillator input.
• Pin 10 (XTAL2/GND): Crystal oscillator output / Ground.
• Pin 11 (P1.0): I/O port 1, bit 0.
• Pin 12 (P1.1): I/O port 1, bit 1.
• Pin 13 (P1.2): I/O port 1, bit 2.
• Pin 14 (P1.3): I/O port 1, bit 3.
• Pin 15 (P1.4): I/O port 1, bit 4.
• Pin 16 (P1.5): I/O port 1, bit 5.
• Pin 17 (P1.6): I/O port 1, bit 6.
• Pin 18 (P1.7): I/O port 1, bit 7.
• Pin 19 (Vcc): Power supply.
• Pin 20 (Vcc): Power supply.

Additional Notes

• Refer to the datasheet for detailed information on register configurations and advanced features.
• Ensure proper decoupling capacitors are used near the power supply pins to stabilize the supply voltage.
• For optimal performance, follow the recommended PCB layout guidelines provided in the datasheet.

If you need more specific information or have any questions, feel free to ask!

(For reference only)