LAPIS Semiconductor ML610472, User Manual

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ML610471/472/473/Q471/Q472/Q473 User's Manual
Chapter 18 LCD Drivers
18-8
18.2.3 Display Mode Register 0 (DSPMOD0)
Address: 0F0F2H
Access: R/W
Access size: 8/16 bit
Initial value: 00H
7 6 5 4 3 2 1 0
DSPMOD0 — FRM1 FRM0 — — DUTY2 DUTY1 DUTY0
R/W R/W R/W R/W R/W R/W R/W R/W R/W
Initial value 0 0 0 0 0 0 0 0
DSPMOD0 is a special function register (SFR) to control the display mode of the LCD drivers.
[Description of Bits]
•
DUTY2 to DUTY0 (bit 2 to 0)
The DUTY2 to DUTY0 bits are used to specify the duty in 5 steps (1/1 to 1/5). The numbers of
commons/segments are determined according to the duty setting.
Product (ML610...) Common to all products 471/Q471 472/Q472 473/Q473
DUTY2 DUTY1 DUTY0
Duty Number of commons/segments
0 0 0 1/1 duty (initial value) 2c-14s 2c-18s 2c-22s
0 0 1 1/2 duty 2c-14s 2c-18s 2c-22s
0 1 0 1/3 duty 3c-13s 3c-17s 3c-21s
0 1 1 1/4 duty 4c-12s 4c-16s 4c-20s
1 * * 1/5 duty 5c-11s 5c-15s 5c-19s
•
FRM1-FRM0 (bit 6, 5)
The FRM1 to FRM0 bits are used to select a frame frequency of the LCD drivers.
The reference frequency of a frame frequency (LLSCLK = 32.768 kHz) is selectable from 64 Hz, 73 Hz, 85 Hz,
or 102 Hz.
FRM1 FRM0
Description
0 0 Reference frequency: 64 Hz (initial value)
0 1 Reference frequency: 73 Hz
1 0 Reference frequency: 85 Hz
1 1 Reference frequency: 102 Hz
The frame frequency for each duty is listed in Table 18-2.
Table 18-2 Frame Frequency for Each Duty
Frame frequency [Hz]
Duty
Reference
frequency
64Hz
Reference
frequency:
73 Hz
Reference
frequency:
85 Hz
Reference
frequency:
102 Hz
1/1 duty 64.00 73.14 85.33 102.40
1/2 duty 64.00 73.14 85.33 102.40
1/3 duty 64.25 73.31 85.33 103.04
1/4 duty 64.00 73.14 85.33 102.40
1/5 duty 64.25 73.64 86.23 102.40