EM78P803B

8-bit Micro-controller

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2006/2/27

V1.3.5

I. Main Feature

Single power supply

Operating voltage range: 2.8V ~ 5.5V(7.1652MHz)

4.5V ~ 5.5V(14.331MHz)

2.2V ~ 5.5V(3.5826MHz/ERIC mode)

2.2V ~ 5.5V(Sleep/Idle/Green mode)

CPU

8-bit RISC kernel

99.9％ single instruction cycle commands

Clock

32.768KHz clock source

Built-in PLL to generate main clock 3.5826MHz x 0.5, 1, 2 and 4

Optional ERIC mode only with an external R

Timer and counter

Watch Dog: Programmable free running on chip watchdog timer

TCC: 8-bit real time clock/counter (TCC) with 8-bit prescaler

COUNTER1: 8-bit counter with 8-bit prescaler can be an interrupt source

COUNTER2: 8-bit counter can be an interrupt source

Two 8-bit counters can combine into one 16-bit counter when in R2F and 16-bit counter mode.

Both of counters have reload function.

Memory

8k x 13bits on chip Electrical One Time Programmable Read Only Memory (OTP-ROM)

0.5k x 8bits on-chip general RAM

112 x 8bits common registers

I/O

Up to 28 bi-directional tri-state I/O ports (15 independent I/O)

IO with internal Pull high, wake-up and interrupt functions

Operation mode

Four modes can be selected. (Main clock is generated by internal PLL.)

Mode

CPU status

Main clock

32.768 kHz clock status

Sleep mode

Turn off

Turn off

Turn off

Idle mode

Turn off

Turn off

Turn on

Green mode

Turn on

Turn off

Turn on

Normal mode

Turn on

Turn on

Turn on

Interrupt

Selective signal sources and overflow interrupt

STACK: 8 levels stack for subroutine nesting

8 interrupt source, 5 external, 3 internal

Reset

Power on reset, /POVD reset (by PAD option) or external /RESET pin

R to F Counter

1 channel 16-bit counter with 2-channel sensors connected.

LCD

LCD operation voltage chosen by software

Common driver pins: 8/4

Segment driver pins: 28

1/3 bias or 1/4 bias with output buffer

1/4 duty or 1/8 duty

PACKAGE

64-pad die (EM78P803BH)

100-pin QFP (EM78P803BQ)