2 control, Toshiba – Toshiba TMP87CP24AF User Manual
Page 92
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TOSHIBA
TMP87CM24A/P24A
2.10.2
Control
The
LCD
driver
is
controlled
using
the
LCD
control
register
(LCDCR).
The
LCD
driver's
display
is
enabled
using
the
EDSP.
Immediately
after
return
from
reset
or
standby,
it
takes
maximum
1
s
(Торг
=-10
°C)
(fc =
8
MHz, SLFR
:00
h
)
for the LCD driver's booster circuit to boost up to the specified voltage. If the
display
is
enabled
before
the
specified
voltage
is
reached,
the
voltage
may
not
be
boosted
properly
due to load on the SEG/COM.
7
6 5
4 3 2
1 0
EDSP
SLfR
____ ________ ___ _____
(Initial value : 0000 0000)
LCDCR
(
0028
h
)
SLF
Selection of LCD
frame frequency
00 : fc/2^^ or fs/2^ [Hz]
01 : fc/2^^ or fs/2^
10 : fc/2^5
11 : fc/2^3
DUTY
Selection of
driving methods
000:1/4 Duty (1/3 Bias)
001:1/3 Duty (1/3 Bias)
010: Reserved
011:1/2 Duty (1/3 Bias)
100: Static
101: Reserved
11*: Reserved
Write
only
SLFR
Selection of boost
frequency
00 : fc/2^3 or fs/2^ [Hz]
01 : fc/2" or fs/2^
10 : fc/2^° or fs/2^
11 : fc/29
EDP
LCD Display Control
0 : Blanking
1 : Enables LCD display (Blanking is released)
Note 1:
fc: High-frequency clock, fs: Low-frequency clock
Note 2:
The LCDCR is a write-only register. It can not be operated by the read-modify-write
instruction (Bit manipulation instructions of SET, CLR, etc. and Arithmetic
instructions of AND, OR, etc.)
Figure 2-44. LCD Driver Control Register
3
-
24-92
2002
-
10-03