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EM78P468N/EM78P468L
8-Bit Microcontroller
44 •
Product Specification (V1.5) 02.15.2007
(This specification is subject to change without further notice)
IR/PWM Function Enable Flowchart
(a) IR application (b) PWM application
Fig. 27 IR/PWM Function Enable Flowchart
SET P5.7 to Output state (IOC 50)
SET P5.7 for IR/PWM Function Output Pin (RE)
SET Counter 2 clock source and prescaler (IOC91)
SET Counter 2
(IOC0)
, High pulse width time
r
(IOD0)
, Low pulse width time
r
(IOCE0)
preset value
Enable I
R
(RE)
HF="1", and IRE="1"
Enable Counter 2, High pulse width timer and Low
pulse width time
r
(RC)
SET High pulse width timer, Low pulse width time
r
clock source and prescaler (IOCA1)
Enable HPWT and LPWT Interrupt
Set
IOCF0
and ENI instruction
Start
END
SET P5.7 to Output state (IOC 50)
SET P5.7 for IR/PWM Function Output Pin (RE)
High pulse width time
r
(IOD0)
, Low pulse width time
r
(IOCE0) preset value
Enable IR (RE)
HF="0", and IRE="1"
Enable high pulse width timer and Low pulse width
Timer (RC)
SET Hi
g
h pulse width timer, Low pulse width time
r
clock source and prescaler (IOCA1)
Enable HPWT and LPWT Interrupt
Set
IOCF0
and ENI instruction
Start
END