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EM78P468N/EM78P468L
8-Bit Microcontroller
24 •
Product Specification (V1.5) 02.15.2007
(This specification is subject to change without further notice)
WDT Setting Flowchart
N
START
Use WDT function ?
Y
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")