17 IR REMOTE CONTROLLER (REMC3)
S1C17M20/M21/M22/M23/M24/M25
Seiko Epson Corporation
17-11
TECHNICAL MANUAL (Rev. 1.0)
Bits 7–2
Reserved
Bit 1
DBIF
Bit 0
APIF
These bits indicate the REMC3 interrupt cause occurrence status.
1 (R):
Cause of interrupt occurred
0 (R):
No cause of interrupt occurred
1 (W):
Clear flag
0 (W):
Ineffective
The following shows the correspondence between the bit and interrupt:
REMINTF.DBIF bit: Compare DB interrupt
REMINTF.APIF bit: Compare AP interrupt
These interrupt flags are also cleared to 0 when 1 is written to the REMDBCTL.REMCRST bit.
REMC3 Interrupt Enable Register
Register name
Bit
Bit name
Initial
Reset
R/W
Remarks
REMINTE
15–8 –
0x00
–
R
–
7–2 –
0x00
–
R
1
DBIE
0
H0
R/W
0
APIE
0
H0
R/W
Bits 15–2 Reserved
Bit 1
DBIE
Bit 0
APIE
These bits enable REMC3 interrupts.
1 (R/W): Enable interrupts
0 (R/W): Disable interrupts
The following shows the correspondence between the bit and interrupt:
REMINTE.DBIE bit: Compare DB interrupt
REMINTE.APIE bit: Compare AP interrupt
REMC3 Carrier Waveform Register
Register name
Bit
Bit name
Initial
Reset
R/W
Remarks
REMCARR
15–8 CRDTY[7:0]
0x00
H0
R/W –
7–0 CRPER[7:0]
0x00
H0
R/W
Bits 15–8 CRDTY[7:0]
These bits set the high level period of the carrier signal.
The carrier signal is set to high level from the 8-bit counter for carrier generation = 0x00 and it is in-
verted to low level when the counter exceeds the REMCARR.CRDTY[7:0] bit-setting value. The car-
rier signal duty ratio is determined by this setting and the REMCARR.CRPER[7:0] bit-setting. (See
Figure 17.4.3.2.)
Bits 7–0
CRPER[7:0]
These bits set the carrier signal cycle.
A carrier signal cycle begins with the 8-bit counter for carrier generation = 0x00 and ends when the
counter exceeds the REMCARR.CRPER[7:0] bit-setting value. (See Figure 17.4.3.2.)