at42qt5480 Quantum Research Group, at42qt5480 Datasheet - Page 5

• Manufacturer Part Number: at42qt5480
• Description: Qtwo? 10-bit Touchscreen Controller
• Manufacturer: Quantum Research Group

1.3
Figure 1-1.
9510AS–AT42–10/08
Vunreg
Follow regulator manufacturer's recommended values
for input and output bypass capacitors (Creg).
Schematic
Typical Circuit
VREG
Rp
Rp
VDD
VDD
Rp
16MHz
XT1
QT5480
Rx7
Rx3
Cs0
Cs1
Cs2
Cs3
Cs4
Cs5
Rs5 Rs4
Add two 100nF capacitors: one close to pins 5, 17 and 38,
and another close to pins 27 and 29.
Rx6
Rx2
Rs3
Rs2 Rs1 Rs0
Rx1
Rx5
Rx0
NOTES:
1) The central pad on the underside of the MLF chip
2) It is important to place all Cs, Rs, Rx and Ry
3) Leave YnA, YnB unconnected if not used
Rx4
components physically near to the chip.
is a Vss pin and should be connected to ground.
Do not put any other tracks underneath
the body of the chip.
Ry0
Ry1
Ry2
Ry3
Ry4
Ry5
QT5480
5