LC87F5WC8A

No.A1898-4/27

Oscillation Circuits

• RC oscillation circuit (internal) : For system clock

• CF oscillation circuit

: For system clock, with internal Rf

• Crystal oscillation circuit

: For low-speed system clock

System Clock Divider Function

• Capable of running on low current.

• The minimum instruction cycle selectable from 250ns, 500ns, 1.0μs, 2.0μs, 4.0μs, 8.0μs, 16.0μs, 32.0μs, and

64.0

μs (at a main clock rate of 12MHz).

Standby Function

• HALT mode: Halts instruction execution while allowing the peripheral circuits to continue operation.

(1) Oscillation is not halted automatically.

(2) Canceled by a system reset or occurrence of interrupt

• HOLD mode: Suspends instruction execution and the operation of the peripheral circuits.

(1) The CF, RC, and crystal oscillators automatically stop operation.

(2) There are three ways of resetting the HOLD mode.

1) Setting the reset pin to the low level.

2) Setting at least one of the INT0, INT1, INT2, INT4, and INT5 pins to the specified level

3) Having an interrupt source established at port 0

• X'tal HOLD mode: Suspends instruction execution and the operation of the peripheral circuits except the base

timer.

(1) The CF and RC oscillators automatically stop operation.

(2) The state of crystal oscillation established when the HOLD mode is entered is retained.

(3) There are four ways of resetting the X'tal HOLD mode.

1) Setting the reset pin to the low level

2) Setting at least one of the INT0, INT1, INT2, INT4, and INT5 pins to the specified level

3) Having an interrupt source established at port 0

4) Having an interrupt source established in the base timer circuit

On-chip Debugger Function

• Enables software debugging with the test device installed on the target board.

Package Form

• QIP100E (14×20)

: Lead-/Halogen-free type

Development Tools

• Evaluation (EVA) chip : LC87EV690

• Emulator

: EVA62S + ECB876600D + SUB875C00 + POD100QFP

: ICE-B877300 + SUB875C00 + POD100QFP

• On-chip-debugger

: TCB87-TypeC (3wire version) + LC87F5WC8A

Programming Boards

Package

Programming boards

QIP100E

W87F52256Q