SX8654ICSTRT SEMTECH [Semtech Corporation], SX8654ICSTRT Datasheet - Page 32

• Manufacturer Part Number: SX8654ICSTRT
• Description: Haptics Enabled 4/5-Wire Resistive Touchscreen Controller with Proximity Sensing
• Manufacturer: SEMTECH [Semtech Corporation]

ADVANCED COMMUNICATIONS & SENSING
5.3.5
PROXDIFF update consists in the complementary operation i.e. subtracting PROXAVG to PROXUSEFUL to
ignore slow capacitances variations (C
5.3.6
PROXSTAT update consists in taking PROXDIFF information (C
threshold PROXTHRESH and finally updating PROXSTAT accordingly. When PROXSTAT=1, PROXAVG is
frozen to prevent the user proximity signal averaging and hence absorbed into C
Rev 1 – 25
PROXDIFF Update
PROXSTAT Update
th
July 2011
Env
Figure 40 – PROXSTAT Update
) and extract only the user related variations i.e. C
Figure 39 – ProxDiff Update
Resistive Touchscreen Controller with Proximity Sensing
32
SX8654/SX8655/SX8656
User
), comparing it with a user programmable
Env
.
Haptics Enabled 4/5-Wire
User
www.semtech.com
.