參數(shù)資料
型號(hào): ST2202
廠商: Electronic Theatre Controls, Inc.
英文描述: 8 BIT Integrated Microcontroller with 256K Bytes ROM
中文描述: 8位微控制器集成256K字節(jié)ROM的
文件頁(yè)數(shù): 44/65頁(yè)
文件大?。?/td> 1946K
代理商: ST2202
Sitronix
16.4.7 LCD Frame Rate Adjust Register
The LCD frame rate adjust register (
LFRA
) specifies the
extended time of each scan line. Thus the frame rate slows
down to be the desired value.
Note:
LFRA
must be a number greater than 4.
The adjusted frame rate for 1- and 4-bit modes can be
found in the following equations
ST2202
Ver 2.0a
44/65
2003-May-05
1-bit Mode
LYMAX
LFRA
LXMAX
LCDCK
+
Rate
Frame
+
=
)
Equation14-1
(
16
4-bit Mode
LYMAX
LFRA
LXMAX
LCDCK
Rate
Frame
+
+
=
)
Equation14-2
(
4
16.4.8 LCD Frame Rate Adjust Register
Address Name R/W
$049
LFRA
Bit 5~0:
LFRA[5:0]
: Extended time of each scan line
Bit 7
-
Bit 6
-
Bit 5
FRA[5]
Bit 4
FRA[4]
Bit 3
FRA[3]
Bit 2
FRA[2]
Bit 1
FRA[1]
Bit 0
FRA[0]
Default
- -00 0000
W
16.4.9 LCD AC Signal Rate Register
The LCD alternating signal rate register (
LAC
) specifies the time of horizontal lines the alternating signal toggles.
TABLE 16-8 LCD AC Signal Rate Register
Address Name R/W
Bit 7
Bit 6
Bit 5
$04A
LAC
R/W
-
-
-
Bit 2~0:
AC[4:0]
: Time of horizontal lines the AC signal toggles
AC[4:0]
AC signal
00000
Every frame
00001
Every 3 lines
00010
Every 5 lines
00011
Every 7 lines
:
:
11101
Every 59 lines
11110
Every 61 lines
11111
Every 63 lines
16.4.10 LCD PWM Contrast Control Register
Bit 4
AC[4]
Bit 3
AC[3]
Bit 2
AC[2]
Bit 1
AC[1]
Bit 0
AC[0]
Default
- - -0 0000
The ST2202 achieves contrast control function by outputting a PWM signal from
BLANK
. The duty ratio of PWM signal, also
is the contrast level, is controlled by
LPWM[5:0]
with 64 steps.
TABLE 16-9 LCD PWM Contrast Control Register
Address Name R/W
Bit 7
Bit 6
Bit 5
Bit 4
$04B LPWM
R/W
-
-
LPWM[5] LPWM[4] LPWM[3] LPWM[2] LPWM[1] LPWM[0] - - 00 0000
Bit 5~0:
LPWM[5~0] :
LCD contrast control
LPWM[5:0]
Contrast Level
00000
64 (maximum)
00001
63
00010
62
:
:
11101
3
11110
2
11111
1 (minimum)
Bit 3
Bit 2
Bit 1
Bit 0
Default
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