Panasonic MN101C77C User Manual

Chapter 6    8-bit Timers

VI - 44

Remote Control Carrier Output

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Remote Control Carrier Output Setup Example (Timer 0, Timer 5)

Here is the setting example that the RMOUT pin outputs the 1/3 duty carrier pulse signal with "H" period

of 36.7 kHz, by using timer 0. The source clock of timer 0 is set to fosc (at 8 MHz).

An example setup procedure, with a description of each step is shown below.

(1)

Set the RMOEN flag of the remote control

carrier output control register (RMCTR) to "0"

to disable the remote control carrier output.

(2)

Set the RMBTMS flag of the RMCTR register

to "0" to set the timer as a base cycle setting

timer.

(3)

Set the RMDTY0 flag of the RMCTR register to

"1" to select 1/3 duty.

(4)

Set the TM0EN flag of the timer 0 mode

register (TM0MD) to stop the timer 0 counting.

(5)

Set the P1OMD0 flag of the port 1 output mode

register (P1OMD) to "1" to set P10 pin as a

special function pin.

Set the P1DIR0 flag of the port 1 direction

control register (P1DIR) to "1" for output mode.

Set the TM0RM flag of the RMCTR register to

"1" to select the remote control carrier output.

Setup Procedure

Description

(1)

Disable the remote control carrier

output.

RMCTR (x'3F6E')

bp3

: RMOEN

= 0

(2)

Select the base cycle setting timer.

RMCTR (x'3F6E')

bp0

: RMBTMS = 0

(3)

Select the carrier output duty.

RMCTR (x'3F6E')

bp1

: RMDTY0

= 1

(4)

Stop the counter.

TM0MD (x'3F54')

bp3

: TM0EN

= 0

(5)

Set the remote control carrier output of

the special function pin.

P1OMD (x'3F2F')

bp0

: P1OMD0

= 1

P1DIR (x'3F31')

bp0

: P1DIR0

= 1

RMCTR (x'3F6E')

bp4

:TM0RM

= 1

Base period
set by timer 0

RMOUT output
(1/3 duty)

Base period set 

by timer 0 (36.7 kHz)