LAPIS Semiconductor ML610471, Руководство пользователя, Страница: 232 / 281

ML610471/472/473/Q471/Q472/Q473 User's Manual
Chapter 18 LCD Drivers
18-7
18.2.2 Bias Circuit Control Register 0 (BIASCON)
Address: 0F0F0H
Access: R/W
Access size: 8-bit
Initial value: 38H
7 6 5 4 3 2 1 0
BIASCON — — BSEL1 BSEL0 BSN2 BSN1 BSN0 —
R/W R/W R/W R/W R/W R/W R/W R/W R/W
Initial value 0 0 1 1 1 0 0 0
BIASCON is a special function register (SFR) to control the bias generation circuit.
[Description of Bits]
•
BSN2-BSN0 (bit 3 to 1)
The BSN2 to BSN0 bits are used to select a clock for multiplying the bias voltage in the bias generation circuit.
LSCLK to 1/128LSCLK can be selected.
BSN2 BSN1 BSN0
Description
0 0 0 1/1 LSCLK (32kHz)
0 0 1 1/2 LSCLK (16kHz)
0 1 0 1/4 LSCLK (8kHz)
0 1 1 1/8 LSCLK (4kHz)
1 0 0 1/16 LSCLK (2 kHz) (initial value)
1 0 1 1/32 LSCLK (1kHz)
1 1 0 1/64 LSCLK (512Hz)
1 1 1 1/128 LSCLK (256Hz)
•
BSEL (bit 5 to 4)
The BSEL bit is used to set the bias in the bias generation circuit.
1/2 bias or 1/3 bias can be selected.
BSEL1 BSEL0
Description
0 0 1/3 bias
0 1 Setting prohibited
1 0 Setting prohibited
1 1 1/2 bias (initial value)