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CAP1006-2-AIA-TR 参数 Datasheet PDF下载

CAP1006-2-AIA-TR图片预览
型号: CAP1006-2-AIA-TR
PDF下载: 下载PDF文件 查看货源
内容描述: 5和6通道电容式触摸传感器 [5 and 6 Channel Capacitive Touch Sensor]
分类和应用: 模拟IC传感器信号电路
文件页数/大小: 53 页 / 736 K
品牌: SMSC [ SMSC CORPORATION ]
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5 and 6 Channel Capacitive Touch Sensor  
Datasheet  
before the next channel is sampled and the result is averaged over the number of samples measured  
before updating the measured results.  
For example, if CS1, CS2, and CS3 are sampled during the sensor cycle, and the AVG[2:0] bits are  
set to take 4 samples per channel, then the full sensor cycle will be: CS1, CS1, CS1, CS1, CS2, CS2,  
CS2, CS2, CS3, CS3, CS3, CS3.  
Table 5.16 AVG Bit Decode  
AVG[2:0]  
NUMBER OF SAMPLES TAKEN  
2
1
0
PER MEASUREMENT  
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
1
2
4
8 (default)  
16  
32  
64  
128  
Bit 2 - SAMP_TIME - Determines the time to take a single sample.  
„
„
‘0’ - The sampling time is ~2.56ms.  
‘1’ (default) - The sampling time is ~1.28ms.  
Bits 1 - 0 - CYCLE_TIME[1:0] - Determines the overall cycle time for all measured channels during  
normal operation as shown in Table 5.17. All measured channels are sampled at the beginning of the  
cycle time. If additional time is remaining, then the device is placed into a lower power state for the  
remaining duration of the cycle.  
Table 5.17 CYCLE_TIME Bit Decode  
CYCLE_TIME[1:0]  
1
0
OVERALL CYCLE TIME  
0
0
1
1
0
1
0
1
35ms  
70ms (default)  
105ms  
140ms  
APPLICATION NOTE: The programmed cycle time is only maintained if the total averaging time for all samples is  
less than the programmed cycle. The AVG[2:0] bits will take priority so that if more samples  
are required than would normally be allowed during the cycle time, the cycle time will be  
extended as necessary to accommodate the number of samples to be measured.  
SMSC CAP1005 / CAP1006  
Revision 1.1 (08-05-09)  
DATA3S7HEET