st2024c Sitronix Technology Corporation, st2024c Datasheet - Page 41

• Manufacturer Part Number: st2024c
• Description: 24k 8-bit Single Chip Microcontroller
• Manufacturer: Sitronix Technology Corporation

15.4 LCD control register
Ver 2.2
*** Measure Condition: Vdd=3V, LCD frame rate=64Hz, OSCX on , in WAI1.
Address Name
Address Name
LCD driving strength level
$03A
$020
$023
$038
$020
Bit 2~0: LCK[2~0] : LCD clock source
Bit 5~3: DRV[2~0] : LCD driving strength control.
The LCD driving strength control will combine HEAV(XLCD[1]) and LENH(LCTL[4]) to select 32 level.
LEVEL 10
LEVEL 11
LEVEL 28
LEVEL 29
LEVEL 30
LEVEL 31
LCK
PRS
XLCD
LCTL
LCK
LEVEL 0
LEVEL 1
LEVEL 2
LEVEL 3
LEVEL 4
LEVEL 5
LEVEL 6
LEVEL 7
LEVEL 8
LEVEL 9
Note: If LCD clock source is from OSCX, after power on, wait one second for
:
:
OSCX to be stable and then turn on LCD.
R/W
R/W
R/W
R/W
R/W
R/W
W
***SENA must switch “1”. ( refer to FIGURE 14-21 )
LCK[2:0]
LPWR
TABLE 15-34: LCD FREQUENCY REGISTER (LCK)
SRES
Bit 7
Bit 7
1XX
000
001
010
011
-
-
-
HEAV
TABLE 15-33: LCD CONTROL REGISTERS
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
BLANK
SENA
Bit 6
Bit 6
-
-
OSC / 131072
OSC / 65536
OSC / 32768
OSC / 16384
OSCX / 512
-
LENH
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
DRV[2]
COMO
SENT
Bit 5
DRV[2]
Bit 5
-
DRV[2]
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
:
:
41/54
DRV[1]
LENH
Bit 4
DRV[1]
( 4MHz / 131072 = 30.5Hz )
( 4MHz / 65536 = 61.0Hz )
( 4MHz / 32768 = 122.1Hz )
( 4MHz / 16384 = 244.1Hz )
Bit 4
-
-
Frame Rate
( 32768 / 512 = 64Hz )
DRV[1]
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
DRV[0]
SEGO
Bit 3
DRV[0]
Bit 3
-
-
DRV[0]
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
CTR[1]
LCK[2]
Bit 2
LCK[2]
Bit 2
-
-
1/4 Duty power
consumption
CTR[0]
LCK[1]
144.17
148.57
152.95
HEAV
Bit 1
16.49
21.09
25.56
34.42
38.83
43.23
47.63
52.03
56.42
60.82
65.21
139.8
LCK[1]
Bit 1
30
-
LCK[0]
DUTY
Bit 0
LCK[0]
Bit 0
:
:
-
-
1/8 Duty power
consumption
106.83
110.15
113.47
116.79
13.37
16.78
20.16
25.99
30.05
33.41
36.73
43.43
46.79
50.13
23.5
40.1
- - 00 0100
000 - - - - -
- - - - - -0-
0000 0000
ST2024C
Default
- -00 0100
Unit: uA
Default
1/31/08