LC866448B/44B/40B/36B/32B/28B/24B/20B/16B/12B/08B

No.6699-4/21

(13) Real-time service operation

The Real-Time Service (RTS) functions the 4-byte data-transfer between the Special Function Registers at

acknowledging the interrupt request.

The RTS starts within 1 instruction cycle-time and completes within 5 instructions cycle-time after occurring the

interrupt request.

(14) Subroutine stack levels

- 128 levels (Max.): Stack area included in RAM area

(15) Multiplication and division

16-bit

× 8-bit (7 instruction cycle times)

16-bit / 8-bit (7 instruction cycle times)

(16) Three oscillation circuits

- On-chip RC oscillation circuit using for the system clock.

- On-chip CF oscillation circuit using for the system clock.

- On-chip crystal oscillation circuit using for the system clock and for time-base clock.

(17) Standby function

- HALT mode function

The HALT mode is used to reduce power dissipation. In this operation mode, program execution is stopped. This

operation mode can be released by interrupt request signals or the initial system reset request signal.

- HOLD mode function

The HOLD mode is used to freeze all the oscillations;

RC (internal), CF and Crystal oscillations. This mode can be released by the following operations.

• Reset terminal ( RES ) set to Low level

• P70/INT0/T0IN, P71/INT1/T0IN terminals set to assigned level (programmable)

• Input a Port 0 interrupt condition

(18) Factory shipment

• QFP80E delivery form

(19) Development support tools

Evaluation (EVA) chip

: LC866097

EPROM version

: LC86E6449

One time version

: LC86P6449

Emulator

: EVA-86000 + ECB866400 (Evaluation chip board) + POD866400 (POD)

Notice for use

1. Set VDD=4.0V to 6.0V at using S16 to S37 as input port.

2. Follow the under table.

Frequency range of the system clock

Voltage range

Clock Divider

Note

15kHz to 30kHz

1/1

Can not use 1/2 divider

30kHz to 6MHz

4.5V to 6.0V

1/1,1/2

15kHz to 30kHz

1/1

Can not use 1/2 divider

30kHz to 1.5MHz

1/1,1/2

1.5MHz to 3MHz

2.5V to 6.0V

1/2

Can not use 1/1 divider

4.5V to 6.0V

1/1,1/2

Internal RC oscillation

2.5V to 6.0V

1/2

Can not use 1/1 divider