Electronics America Single-Chip Microcontrollers User's Manual

CHAPTER 15 REMOTE CONTROLLER RECEIVER ( µ PD789489, 78F9489 ONLY)
User’s Manual U15331EJ4V1UD
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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.
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/fPRS
1 Eliminate noise less than 2/fPRS
PRSEN Internal clock division control signal
0 Clock not divided internally (fPRS = fREM)
1 Clock internally divided into two (fPRS = fREM/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