
15-2
ML63326 User's Manual
Chapter 15 LCD Driver (LCD)
15.3 LCD Driver Registers
(1) Display control register (DSPCON0)
DSPCON0 is a 4-bit special function register (SFR) controlling LCD driver operation.
bit 3: BISEL
This bit selects 1/4 or 1/5 bias.
At system reset it is "0", selecting 1/5 bias.
bit 2: PDWN
This bit selects the LCD power down mode. When PDWN is set to "1", the bias
generation circuit stops its voltage lowering/raising operation and pins COM1–16
and SEG0–63 are all set to the V
SS
level, reducing supply current. At system reset
it is cleared to "0".
bit 1: ALLON
When ALLON is set to "1" all segment drivers are turned on. The ALLON bit has
priority over the LCDON bit. At system reset it is cleared to "0".
bit 0: LCDON
When the LCDON bit is set to "1", the display data in the display register is output
to the segment drivers. At system reset it is cleared to "0", and all segment drivers
are turned off.
BISEL
PDWN
ALLON
LCDON
LCD bias select
0 : 1/5 bias (initial value)
1 : 1/4 bias
LCD power down mode
0 : Normal operation mode (initial value)
1 : Power down mode
All-ON mode
0 : Normal operation mode (initial value)
1 : All-ON mode
LCD display select
0 : All OFF (initial value)
1 : Normal operation mode
DSPCON0 (090H)
(R/W)
bit 3
bit 2
bit 1
bit 0
Содержание ML63326
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