Inter-Integrated Circuit
9.3.2.7
I 2 C Programmable Input Glitch Filter register
7
6
5
4
3
2
1
0
Read
0
0
0
FLT4
FLT3
FLT2
FLT1
FLT0
Write
Reset
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 9-8. I 2 C Programmable Input Glitch Filter register (IICFLT)
Table 9-10. I 2 C Programmable Input Glitch Filter register (IICFLT) Field Descriptions
Bit(s)
7–5
4–0
Field
FLT
Description
Reserved.
I 2 C Programmable Filter Factor
Contains the programming controls for the width of glitch (in terms of bus clock cycles) the filter
must absorb; in other words, the filter does not let glitches less than or equal to this width setting
pass.
For instance: FLT[3:0]
0000 No Filter/Bypass
0001 Filter glitches up to width of 1 (half) IPBUS clock cycle
0010 Filter glitches up to width of 2 (half) IPBUS clock cycles
0011 Filter glitches up to width of 3 (half) IPBUS clock cycles
0100 Filter glitches up to width of 4 (half) IPBUS clock cycles
0101 Filter glitches up to width of 5 (half) IPBUS clock cycles
0110 Filter glitches up to width of 6 (half) IPBUS clock cycles
0111 Filter glitches up to width of 7 (half) IPBUS clock cycles
1000 Filter glitches up to width of 8 (half) IPBUS clock cycles
1001 Filter glitches up to width of 9 (half) IPBUS clock cycles
1010 Filter glitches up to width of 10 (half) IPBUS clock cycles
1011 Filter glitches up to width of 11 (half) IPBUS clock cycles
1100 Filter glitches up to width of 12 (half) IPBUS clock cycles
1101 Filter glitches up to width of 13 (half) IPBUS clock cycles
1110 Filter glitches up to width of 14 (half) IPBUS clock cycles
1111 Filter glitches up to width of 15 (half) IPBUS clock cycles
MMA955xL Intelligent, Motion-Sensing Platform Hardware Reference Manual, Rev. 1.0
Freescale Semiconductor, Inc.
167
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