SX8656IWLTRT Semtech, SX8656IWLTRT Datasheet - Page 42

• Manufacturer Part Number: SX8656IWLTRT
• Description: 58T7568
• Manufacturer: Semtech

Specifications of SX8656IWLTRT

• 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
10 R
10.1 Hardware (POR and NRST)
The chip generates its own power on reset (POR) signal after a power supply is connected to the VDD pin.
NRST input pin can be used to reset the chip anytime, it must be connected to VDD (or greater) either directly (if
not used), or via a resistor.
10.2 Software (RegReset)
Writing 0xDE to RegReset register will reset the chip and all registers to their default values. NIRQ will go low
during the reset phase and chip can be accessed normally again after NIRQ rising edge. Additionally bit
RESETSTAT will be set (cleared when reading RegStat).
10.3 ESD Event (RESETSTAT)
In case of ESD event, the chip can reset to protect its internal circuitry. NIRQ will go low during the reset phase
and chip can be accessed normally again after NIRQ rising edge. Additionally bit RESETSTAT will be set
(cleared when reading RegStat).
Rev 1 – 25
1. Device behavior is undefined until VDD rises above VPOR, at which point internal reset procedure is
2. After t
3. In operation, the chip may be reset at anytime by an external device driving NRST low for t
ESET
started and NIRQ is kept low.
longer. NIRQ will go low during the reset phase and chip can be accessed normally again after NIRQ
rising edge. Additionally bit RESETSTAT will be set (cleared when reading RegStat)
th
July 2011
RESET
, the reset procedure is completed and NIRQ is released high.
VDD
Reset
Signal
NIRQ
Figure 51 – Hardware Reset Conditions
VPOR
Undefined
Undefined
1
t
RESET
Resistive Touchscreen Controller with Proximity Sensing
42
2
3
t
PULSE
SX8654/SX8655/SX8656
Haptics Enabled 4/5-Wire
www.semtech.com
PULSE
or