參數(shù)資料
型號(hào): MSC1209
廠商: OKI SEMICONDUCTOR CO., LTD.
英文描述: 42-Bit Vacuum Fluorescent Display Tube Driver with Digital Dimming Function
中文描述: 42位真空熒光顯示管和數(shù)字調(diào)光功能驅(qū)動(dòng)程序
文件頁數(shù): 11/16頁
文件大?。?/td> 172K
代理商: MSC1209
Semiconductor
MSC1209
11/15
Oscillator
Connect an external capacitor (C), as shown in Figure 4. The oscillating frequency f
OSC
depends
on the external capacitor used. The following equation is true between f
OSC
and grid frequency
(f
GRID
):
f
GRID
= f
OSC
/2048
Figure 4 Oscillator Equivalent Circuit
Dimming Function
The duty cycle of grid output can be changed in 1/2048 step with respect to 10-bit dimming data.
Table 1 shows the relationship between dimming data and duty ratio.
Table 1 Dimming Data and Duty Ratio
Note:
Setting for address 3FF
H
is invalid.
Duty ratios are programmable within the range of 0/2048 (0%) to 1016.5/2048 (49.6%). Figure
5 shows the grid output timing.
Cascade Connection
When two MSC1209 ICs are used in cascade connection, use the MODEA and MODEB pins to
connect them, as shown below.
MSC1209
(Master)
MODEA
MODEB
OSC
SEL
MSC1209
(Slave)
MODEA
MODEB
OSC
SEL
5V
OPEN
(MSB)
00
00
~
11
11
11
~
11
Dimming Data
0000
0000
~
1111
1111
1111
~
1111
(LSB)
0000
0001
~
0111
1000
1001
~
1110
Duty Ratio
0/2048
1/2048
~
1015/2048
1016/2048
1016.5/2048
~
1016.5/2048
Max
Max
C (68pF)
f
OSC
OSC Pin
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