
I/O Model Reference 45
Figure 17. Touch I/O for Series 3100 Devices and Timing
Table 18. Touch I/O Latency Values for Series 3100 Devices
Symbol Description Minimum Typical Maximum
t
rsto
Reset call to data line low — 60.0 μs —
t
rstl
Reset pulse width — 500 μs —
t
pdh
Reset pulse release to data line high
10 MHz
5 MHz
4.8 μs
9.6 μs
—
275 μs
275 μs
t
pdl
Presence pulse width — 120.0 μs —
t
wh
Data line high detect to presence pulse — 80 μs —
t
rret
Return from reset function — 12.6 μs —
t
f
I/O call to data line low (start of bit slot) — 125.4 μs —
t
low
Start pulse width
10 MHz
5 MHz
—
4.2 μs
8.4 μs
—
t
rdi
Start pulse edge to sampling of input (read
operation)
10 MHz
5 MHz
—
15.0 μs
18.0 μs
—
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