EM78P468NBQSSLASHNBQJ datasheet(19/82 Pages) EMC

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EM78P468N/L

8-Bit Microcontroller

Product Specification (V1.6) 12.31.2007

• 13

(This specification is subject to change without further notice)

CPU Operation Mode

Green Mode

fm:stop

fs:oscillation

CPU: using fs

Normal Mode

fm:oscillation

fs:oscillation

CPU: using fosc

IDLE Mode

fm:stop

fs:oscillation

CPU: stop

SLEEP Mode

Fm:stop

Fs: stop

CPU: stop

IDLE="1"

SLEP

IDLE="0"

SLEP

wakeup

Wake up

RESET

CPUS="1"

CPUS="0"

Code option

HLFS=0

Code option

HLFS=1

The w ake up time from idle to green

mode is 16*1/fs

The w ake up time from sleep to green mode is

approximately sub-oscillator setup time +18ms+16*1/fs

it must delay a little times for the main

oscillation stable w hile your system timing

control is conscientious

Fig. 6-3 CPU Operation Mode

6.1.15 RE/IRCR (IR and Port 5 Setting Control Register)

(Address: 0Eh)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

IRE

LGP

−

IROUTE

TCCE

EINT1

EINT0

Bit 7 (IRE):

Infrared Remote Enable bit

IRE = “0” :

Disable the IR/PWM function. The state of P5.7/IROUT pin is

determined by Bit 7 of IOC 50 if it is for IROUT.

IRE = “1” :

Enable IR or PWM function.

Bit 6 (HF):

High carry frequency

HF = “0” :

For PWM application, disable the H/W modulator function. The IROUT

waveform is generated according to high-pulse and low-pulse time as

determined by the respective high pulse and low pulse width timers.

Counter 2 is an independent auto reload timer.

HF = “1” :

For IR application mode, enable the H/W modulator function, the low

time sections of the generated pulse is modulated with the Fcarrier

frequency. The Fcarrier frequency is provided by Counter 2.

Bit 5 (LGP):

IROUT for of low pulse width timer

LGP = “0” :

The high-pulse width timer register and low-pulse width timer is valid.

LGP = “1” :

The high-pulse width timer register is ignored. So the IROUT

waveform is dependent on the low-pulse width timer register only.

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