FEATURES

? Memory configuration

OTP ROM size: 2K * 16 bits.

RAM size: 64 * 8 bits.

Four levels stack buffer

? I/O pin configuration

Bi-directional: P0, P1, P5.

Input only: P1.5.

Programmable open-drain: P1.0.

Wakeup: P0, P1 level change trigger

Pull-up resisters: P0, P1, P5.

External Interrupt trigger edge:

P0.0 controlled by PEDGE register.

P0.1 is falling edge trigger only.

? 3-Level LVD.

Reset system and power monitor.

? Four interrupt sources

Two internal interrupts: T0, TC0.

One external interrupts: INT0, INT1.

? Powerful instructions

One clocks per instruction cycle (1T)

Most of instructions are one cycle only.

All ROM area JMP instruction.

All ROM area CALL address instruction.

All ROM area lookup table function (MOVC)

? Two 8-bit Timer/Counter

T0: Basic timer

TC0: Auto-reload timer/Counter/PWM0/Buzzer output

? On chip watchdog timer and clock source is internal

low clock RC type (16KHz @3V, 32KHz @5V).

? Dual system clocks

External high clock: RC type up to 10 MHz

External high clock: Crystal type up to 16 MHz

Internal high clock: 16MHz RC type.

Internal low clock: RC type 16KHz(3V), 32KHz(5V)

? Operating modes

Normal mode: Both high and low clock active

Slow mode: Low clock only

Sleep mode: Both high and low clock stop

Green mode: Periodical wakeup by T0 Timer

? Package (Chip form support)

PDIP 20 pins

PDIP 18 pins

PDIP 14 pins

SOP 20 pins

SOP 18 pins

SOP 14 pins

SSOP 20 pins