
16 lCD DRiVeR (lCD)
16-10
Seiko epson Corporation
S1C17153 TeChniCal Manual
(Rev. 1.0)
8.2 Clock Division Ratio Selection
Table 16.
lCDTClKD[1:0]
Division ratio
0x3
1/8192
0x2
1/4096
0x1
1/2048
0x0
1/1024
(Default: 0x0)
No division ratio needs to be selected if OSC1A is selected as the LCD clock source (fixed at 1/64).
D[3:2]
lCDTClKSRC[1:0]: lCD Clock Source Select Bits
Selects the LCD clock source.
8.3 Clock Source Selection
Table 16.
lCDTClKSRC[1:0]
Clock source
0x3, 0x2
Reserved
0x1
OSC1A
0x0
OSC3B
(Default: 0x0)
D1
Reserved
D0
lCDTClKe: lCD Clock enable Bit
Enables or disables the LCD clock supply to the LCD driver.
1 (R/W): Enabled (on)
0 (R/W): Disabled (off) (default)
The LCDTCLKE default setting is 0, which stops the clock. Setting LCDTCLKE to 1 feeds the clock
to the LCD driver. If no LCD display is required, stop the clock to reduce current consumption.
lCD Display Control Register (lCD_DCTl)
Register name address
Bit
name
Function
Setting
init. R/W
Remarks
lCD Display
Control Register
(lCD_DCTl)
0x50a0
(8 bits)
D7–5
–
reserved
–
–
–
0 when being read.
D4
DSPReV
Reverse display control
1 Normal
0 Reverse
1
R/W
D3–2
–
reserved
–
–
–
0 when being read.
D1–0
DSPC[1:0]
LCD display control
DSPC[1:0]
Display
0x0 R/W
0x3
0x2
0x1
0x0
All off
All on
Normal display
Display off
D[7:5]
Reserved
D4
DSPReV: Reverse Display Control Bit
Inverts (negative display) the LCD display.
1 (R/W): Normal display (default)
0 (R/W): Inverted display
Setting DSPREV to 0 inverts the LCD panel display; setting to 1 returns the display to normal status.
This operation does not affect the contents of the display memory.
D[3:2]
Reserved
D[1:0]
DSPC[1:0]: lCD Display Control Bits
Controls the LCD display.
8.4 LCD Display Control
Table 16.
DSPC[1:0]
lCD display
0x3
All off (static)
0x2
All on (dynamic)
0x1
Normal display
0x0
Display off
(Default: 0x0)