LC877C64C/56C/48C/40C/32C/24C

No.A0135-4/21

High-speed Multiplication/Division Instructions

• 16 bits × 8 bits

(5 tCYC execution time)

• 24 bits × 16 bits

(12 tCYC execution time)

• 16 bits ÷ 8 bits

(8 tCYC execution time)

• 24 bits ÷ 16 bits

(12 tCYC execution time)

Oscillation Circuits

• On-chip RC oscillation for system clock use.

• CF oscillation for system clock use. (Rf built in, Rd external)

• Crystal oscillation low speed system clock use. (Rf built in, Rd external)

• On-chip frequency variable RC oscillation circuit for system clock use.

System Clock Divider

• Low power consumption operation is available

• Minimum instruction cycle time (300ns, 600ns, 1.2µs, 2.4µs, 4.8µs, 9.6µs, 19.2µs, 38.4µs, 76.8µs can be switched

by program (when using 10MHz main clock)

Standby Function

• HALT mode

HALT mode is used to reduce power consumption. During the HALT mode, program execution is stopped but

peripheral circuits keep operating (some parts of serial transfer operation stop).

1) Oscillation circuits are not stopped automatically.

2) Released by the system reset or interrupts.

• HOLD mode

HOLD mode is used to reduce power consumption. Program execution and peripheral circuits are stopped.

1) CF, RC, X’tal and multi-frequency RC oscillation circuits stop automatically.

2) Released by any of the following conditions.

(1) Low level input to the reset pin

(2) Specified level input to one of INT0, INT1, INT2

(3) Port 0 interrupt

• X’tal HOLD made

X’tal HOLD mode is used to reduce power consumption. Program execution is stopped.

All peripheral circuits except the base timer are stopped.

1) CF, RC and multi-frequency RC oscillation circuits stop automatically.

2) Crystal oscillator operation is kept in its state at HOLD mode inception.

3) Released by any of the following conditions

(1) Low level input to the reset pin

(2) Specified level input to one of INT0, INT1, INT2

(3) Port 0 interrupt

(4) Base-timer interrupt

Package Form

• QFP80 (14 × 14):

Lead-free type

• TQFP80J (12 × 12):

Lead-free type

Development Tools

• Evaluation chip:

LC87EV690

• Emulator:

EVA62S + ECB876600D + SUB877100 + POD80QFP(14

× 14) or POD80SQFP

ICE-B877300 + SUB877100 + POD80QFP(14

× 14) or POD80SQFP

• Flash ROM Version: LC87F7CC8A