17

* This specification are subject to be changed without notice.

EM73201

4-BIT MICRO-CONTROLLER FOR GENERAL PURPOSE PRODUCT

Preliminary

7.20.1999

P16

3

2

1

0

initial value :0000

SWWT Set wake-up warm-up time

2

/XIN

2

/XIN

2

/XIN

Hold mode

SE Enable sleep/hold

0

Reserved

1

Enable sleep / hold rnode

0

1

Wake-up in edge release mode

Reserved

0 0

0 1

1 0

1 1

18

14

16

WM SE

SWWT

WM Set wake-up release mode

During sleep and hold condition, CPU holds the system's internal status with a low power consumption, for

the sleep mode, the system clock will be stoped in the sleep condition and system need a warm up time for

the stability of system clock running after wakeup . In the other way, for the hold mode, the system clock

does not stop at all and it does not need a warm-up time any way.

The sleep and hold mode is controlled by Port 16 and released by P0(0..3)/WAKEUP0-3.

Sleep and hold condition:

1. Osc stop ( sleep only ) and CPU internal status held .

2. Internal time base clear to"0"

3. CPU internal memory ,flags, register, I/O held original states.

4. Program counter hold the executed address after sleep release.

Release condition:

1. Osc start to oscillating.(sleep only)

2. Warm-up time passing ( sleep only ).

3. According PC to execute the following program.

There is one kind of sleep/hold release mode .

1.Edge release mode:

Release sleep/hold condition by the falling edge of any one of P0(0..3)/WAKEUP0-3.

Note : There is only one mask option for weakeup function in EM73201. So,the weakeup function of

P0(0..3)/WAKEUP0..3 are enabled or disabled together.

INFRARED SIGNAL

The infrared signal generator supports user different frequencies and duties clock signal by P1.0/CLKOUT

pin.

The basic structure of infrared signal generator is composed by a frequency divider and a duty controller,

these two parts generate differen frequencies and dutyies according to the command port, Port4 and Port5,

assigned . When the CPU is reseted, the CPU is reseted, the P1.0/CLKOUT pin will keep high.

PORT5

PORT4

AB

CD

E

32

10

32

1

0

initial state : 0 x x x initial state : 0 0 0 0