LC86F3448B Datasheet, PDF (4/21 Pages) Sanyo Semicon Device – 8-bit 1-chip Microcontroller

LC86F3448B
• Base Timer
Generate every 500ms overflow for a clock application
(using 32.768kHz crystal oscillation for the base timer clock)
Generate every 976µs, 3.9ms, 15.6ms, 62.5ms overflow
(using 32.768kHz crystal oscillation for the base timer clock)
Clock for the base timer is selectable from 32.768kHz crystal oscillation, system clock or programmable prescaler
output of Timer 0
„Remote Control Receiver Circuit (connected to the P73/INT3/T0IN terminal)
• Noise rejection function
• Polarity switching
„Watchdog Timer
External RC circuit is required
Interrupt or system reset is activated when the timer overflows
„ROM Correction Function
Max 128 bytes / 2 addresses
„Interrupts
• LC863400 series : 12 source 8 vectored interrupts
LC863500 series : 13 source 8 vectored interrupts
1. External Interrupt INT0
2. External Interrupt INT1
3. External Interrupt INT2, Timer/counter T0L (Lower 8 bits)
4. External Interrupt INT3, base timer
5. Timer/counter T0H (Upper 8 bits)
6. Data slicer(LC863400 series only)
Timer TIH,TIL (LC863500 series only)
7. Vertical synchronous signal interrupt (VS), Scan line
8. IIC, Software
• Interrupt Priority Control
Three interrupt priorities are supported (low, high and highest) and multi-level nesting is possible. Low or high
priority can be assigned to the interrupts from 3 to 8 listed above. For the external interrupt INT0 and INT1, low or
highest priority can be set.
„Sub-routine Stack Level
• A maximum of 128 levels (stack is built in the internal RAM)
„Multiplication/Division Instruction
• 16 bits×8 bits (7 instruction cycle times)
• 16 bits÷8 bits (7 instruction cycle times)
„3 Oscillation Circuits
• Built-in RC oscillation circuit used for the system clock
• Built-in VCO circuit used for the system clock and OSD
• X’tal oscillation circuit used for base timer, system clock and PLL reference
„Standby Function
• HALT mode
The HALT mode is used to reduce the power dissipation. In this operation mode, the program execution is stopped.
This mode can be released by the interrupt request or the system reset.
• HOLD mode
The HOLD mode is used to stop the oscillations; RC (internal), VCO, and X’tal oscillations. This mode can be
released by the following conditions.
- Pull the reset terminal (RES) to low level.
- Feed the selected level to either P70/INT0 or P71/INT1.
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