SX8657IWLTRT Semtech, SX8657IWLTRT Datasheet - Page 31

• Manufacturer Part Number: SX8657IWLTRT
• Description: 58T7570
• Manufacturer: Semtech

Specifications of SX8657IWLTRT

• Controller Type: Resistive Touch Screen
• Ic Interface Type: I2C, Serial
• Supply Voltage Range: 2.3V To 3.6V
• Operating Temperature Range: -40°C To +85°C
• No. Of Pins: 20
• Resolution (bits): 12bit

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 38 – PROXSTAT Update
) and extract only the user related variations i.e. C
Figure 37 – ProxDiff Update
Resistive Touchscreen Controller with Proximity Sensing
31
User
), comparing it with a user programmable
Env
SX8657/SX8658
.
Haptics Enabled 4/5-Wire
User
www.semtech.com
.