LAPIS Semiconductor ML62Q1000 Series, User Manual, Page: 761 / 882

ML62Q1000
Series User's Manual
Chapter 27 LCD Driver
FEUL62Q1000 27-11
27.2.3 Display Mode Register (DSPMOD)
DSPMODH is a special function register (SFR) to control the LCD driver waveform type.
DSPMODL is a special function register (SFR) to control the LCD driver frame frequency and duty.
Write the DSPMODL when the display turns off (when the LMD1 bit and LMD0 bit of DPSCON register are "0").
Writing to the DSPMODL is disabled in other modes.
Address: 0xF0F2(DSPMODL/DSPMOD)
，
0xF0F3(DSPMODH)
Access: R/W
Access size: 8/16 bits
Initial value: 0x0040
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Word DSPMOD
Byte DSPMODH DSPMODL
But
− − −
WTY
PE
− − − −
FRM
2
FRM
1
FRM
0
−
DUT
Y3
DUT
Y2
DUT
Y1
DUT
Y0
R/W R R R R/W R R R R R/W R/W R/W R R/W R/W R/W R/W
Initial
value
0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0
Bit No. Bit name Description
15 to 13 Reserved bits -
12 WTYPE This bit is used to select the LCD drive waveform. Either the waveform A or B is selectable.
Select the waveform A when driving the LED.
0: Waveform A (initial value)
1: Waveform B
11 to 8 Reserved bits -
7 to 5 FRM2 to
FRM0
These bits are used to select the frame frequency of the LCD driver.
000: Frame frequency 32 Hz
001: Frame frequency 38 Hz
010: Frame frequency 64 Hz (initial value)
011: Frame frequency 75 Hz
100: Frame frequency 128 Hz
101: Frame frequency 150 Hz
110: Frequency adjustment check test mode *
1
Generates a Frame frequency of 32 Hz by using the adjusted frequency.
111: Frequency adjustment check test mode *
1
Generates a Frame frequency of 64 Hz by using the adjusted frequency.
*
1
: The Frequency adjustment check test mode is for monitoring the adjusted frequency of
low-speed time base counter. For more details, see Section 7.3.3 “The way of monitoring
the frequency on LCD drive outputs“.
4 Reserved bits -
3 to 0 DUTY3 to
DUTY0 These bits are used to set the display duty and common pin. For the COM7 to COM3 pin
functions, the settings of these bits are given priority over the segment mode register.
0000: COM pin not used (initial value).
0001: 1/1 duty. COM0 pin used.
0010: 1/2 duty. COM0 to COM1 pins used.
0011: 1/3 duty. COM0 to COM2 pins used.
0100: 1/4 duty. COM0 to COM3 pins used.
0101: 1/5 duty. COM0 to COM4 pins used.
0110: 1/6 duty. COM0 to COM5 pins used.
0111: 1/7 duty. COM0 to COM6 pins used.
1000: 1/8 duty. COM0 to COM7 pins used.
Others: Setting prohibited (COM pin not used).