NEC PD78F9488 Manuale Utente
CHAPTER 15 REMOTE CONTROLLER RECEIVER (
µ
PD789489, 78F9489 ONLY)
User’s Manual U15331EJ4V1UD
277
15.3 Registers to Control Remote Controller Receiver
The remote controller receiver is controlled by the following register.
• Remote controller receive control register (RMCN)
(1) Remote controller receive control register (RMCN)
This register is used to enable/disable remote controller reception and to set the noise elimination width, clock
internal division, input invert signal, and source clock.
RMCN is set with a 1-bit or 8-bit memory manipulation instruction.
RESET input sets RMCN to 00H.
internal division, input invert signal, and source clock.
RMCN is set with a 1-bit or 8-bit memory manipulation instruction.
RESET input sets RMCN to 00H.
Figure 15-3. Format of Remote Controller Receive Control Register (1/2)
Symbol
7 6 5 4 3 2 1 0
Address
After
reset
R/W
RMCN RMEN NCW PRSEN RMIN
0
0
RMCK1 RMCK0 FF60H 00H
R/W
RMEN
Control of remote controller receive operation
0
Disable remote controller reception
1
Enable remote controller reception
NCW
Noise elimination width control signal
0
Eliminate noise less than 1/f
PRS
1
Eliminate noise less than 2/f
PRS
PRSEN
Internal clock division control signal
0
Clock not divided internally (f
PRS
= f
REM
)
1
Clock internally divided into two (f
PRS
= f
REM
/2)
RMIN
Remote controller input invert signal
0
Input positive phase
1
Input negative phase
Cautions 1. Always set bits 2 and 3 to 0.
2. To change the values of NCW, PRSEN, RMIN, RMCK1, and RMCK0, disable remote
controller reception (RMEN = 0) first.
Remarks 1. f
REM
: Source clock of remote controller counter (selected by bits 0 and 1 (RMCK0 and RMCK1)
2. f
PRS
: Operation clock inside remote controller receiver