EM78P468N_0712 datasheet(30/82 Pages) EMC

30 / 82 page

EM78P468N/L

8-Bit Microcontroller

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Product Specification (V1.6) 12.31.2007

(This specification is subject to change without further notice)

WDT Setting Flowchart

START

Use WDT function ?

Setting WDT prescaler

(IOC81 register)

Enable WDT

(bit 3 of IOC81)

END

Enable WDT function : set bit 7 of

Code option Word 0 to "0"

Disable WDT function : set bit 7 of

Code option Word 0 to "1"

WDTtime= prescaler*256/Fs

Fs: sub-oscillator frequency

TCC Setting Flowchart

from External Input

START

TCC clock source?

External/ instruction cycle

*set clock source from external TCC pin

(set bit 4 of IOC71 to "1")

*set P5.6/TCC for TCC input Pin

( set bit 2 of RE to "1" and set bit 6 of IOC 50 to "1")

*choose TCC pin operation edge

(set by bit 4 of IOC71)

*choose TCC prescaler

(set by bit 0 to bit 3 of IOC71)

END

*choose TCC clock source from instruction cycle

(set bit 4 of IOC71 to "0")

*choose TCC prescaler

(set by bit 0 to bit 3 of IOC71)

from Instruction Cycle

Enable TCC to start count

(use ENI instruction)

* Enable TCC interrupt Mask

(set bit 0 of IOCF0 to "1")

*Clear TCC interrupt Flag

(set bit 0 of RF to "0")

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