Application Example: Driving El Lamp; Control Registers; Remc3 Clock Control Register - Epson S1C17M20 Technical Manual

17.6 Application Example: Driving EL Lamp

The REMC3 can be used to simply drive an EL lamp as an application example. Figures 17.6.1 and 17.6.2 show an
example of an EL lamp drive circuit and an example of the drive waveform generated, respectively. For details of
settings and an example of components, refer to the Application Note provided separately.
REMO
CLPLS
The REMO and CLPLS signals are output from the respective pins while the REMDBCTL.PRUN bit = 1. The dif-
ference between the setting values of the REMDBLEN.DBLEN[15:0] bits and REMAPLEN.APLEN[15:0] bits
becomes the CLPLS pulse width (high period).

17.7 Control Registers

REMC3 Clock Control Register

Register name Bit
REMCLK 15–9 –
8
7–4 CLKDIV[3:0]
3–2 –
1–0 CLKSRC[1:0]
Bits 15–9 Reserved
Bit 8 DBRUN
This bit sets whether the REMC3 operating clock is supplied in DEBUG mode or not.
1 (R/W): Clock supplied in DEBUG mode
0 (R/W): No clock supplied in DEBUG mode
Bits 7–4 CLKDIV[3:0]
These bits select the division ratio of the REMC3 operating clock.
Bits 3–2 Reserved
S1C17M20/M21/M22/M23/M24/M25
TECHNICAL MANUAL (Rev. 1.0)
V
DD
S1C17
REMO
REMC3
CLPLS
V
SS
Figure 17.6.1 Example of EL Lamp Drive Circuit
REMDBLEN.DBLEN[15:0]
REMAPLEN.APLEN[15:0]
Writing 1 to REMDBCTL.PRUN
Figure 17.6.2 Example of Generated Drive Waveform
Bit name Initial
0x00
DBRUN 0
0x0
0x0
0x0
Seiko Epson Corporation
17 IR REMOTE CONTROLLER (REMC3)
L
1
V = 50–200 V
EL
R
1
D
1
Q
1
R
3
R
2
Q
2
External components
Reset R/W
– R –
H0 R/W
H0 R/W
– R
H0 R/W
+
EL lamp
REMCARR.CRPER[7:0]
REMCARR.CRDTY[7:0]
Remarks
17-7