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AS1112_1 参数 Datasheet PDF下载

AS1112_1图片预览
型号: AS1112_1
PDF下载: 下载PDF文件 查看货源
内容描述: 16通道LED驱动器,具有点校正和灰度PWM [16-Channel LED Driver with Dot Correction and Greyscale PWM]
分类和应用: 驱动器
文件页数/大小: 18 页 / 611 K
品牌: AMSCO [ AMS(艾迈斯) ]
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AS1112  
Datasheet - Detailed Description  
Figure 10. Dot Correction Data Input Timing Diagram  
Dot Correction Mode  
Data Input Cycle n  
Dot Correction Mode  
Data Input Cycle n +1  
VCC  
MODE  
GND  
DCn-1  
LSB  
DCn  
MSB  
DCn  
MSB-1  
DCn  
MSB-2  
DCn  
LSB+1  
DCn  
LSB  
DCn+1  
MSB  
DCn+1  
MSB-1  
SDI  
tSU0  
tWH0  
2
CLK  
1
1
95  
96  
1
2
tWL0  
DCn-1  
MSB  
DCn-1  
MSB-1  
DCn-1  
MSB-2  
DCn-1  
LSB+1  
DCn-1  
LSB  
DCn  
DCn  
MSB-1 MSB-2  
DCn  
MSB  
tWH2  
SDO  
LD  
tSU1  
tH1  
Setting Greyscale Brightness  
The brightness of each channel output can be adjusted using a 12 bits-per-channel PWM control scheme which results  
in 4096 brightness steps, from 0% to 100% brightness. The brightness level for each output is calculated as:  
GSn  
%Brightness=  
x 100  
(EQ 4)  
4095  
Where:  
GSn is the programmed greyscale value for OUTn (GSn = 0 to 4095);  
n = 0 to 15 greyscale data for all outputs.  
The device powers up with the following default seetings: GS = 4095 and DC = 63.  
The input shift register shifts greyscale data into the greyscale register for all channels simultaneously. The complete  
greyscale data format consists of 16 x 12 bit words, which forms a 192-bit wide data packet (see Figure 11).  
Note: The data packet must be clocked in with the MSB first.  
Figure 11. Greyscale Data Packet Format  
MSB  
191  
LSB  
0
180  
179  
12  
11  
...  
...  
...  
GS15.11  
GS15.0 GS14.11  
GS1.0  
GS0.11  
GS0.0  
GS OUT15  
GS OUT14:GS OUT1  
GS OUT0  
When pin MODE is tied to GND, the AS1112 enters greyscale data input mode. The device switches the input shift reg-  
ister to 192-bit width. After all data is clocked in, the rising edge of the LD signal latches the data into the greyscale reg-  
ister (see Figure 12).  
All greyscale data in the input shift register is replaced with status information data (SID) after latching into the grey-  
scale register.  
www.austriamicrosystems.com  
Revision 1.06  
12 - 18  
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