at42qt5480 Quantum Research Group, at42qt5480 Datasheet - Page 6

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

Figure 1-2.
6
Vunreg
Follow regulator manufacturer's recommended values
for input and output bypass capacitors (Creg).
QT5480
Typical Circuit – BGA
VREG
Suggested regulator manufacturers:
• Torex (XC6215 series)
• Seiko (S817 series)
• BCDSemi (AP2121 series)
Rp
Rp
VDD
VDD
Rp
16MHz
XT1
QT5480
Rx7
Rx3
Cs0
Cs1
Cs2
Cs3
Cs4
Cs5
Rs5
Add two 100nF capacitors: one close to balls A5, C1 and G3,
and another close to balls E7 and C7.
Rs4
Rx6
Rx2
Rs3
Rs2 Rs1 Rs0
Rx1
Rx5
Rx0
NOTES:
1) It is important to place all Cs, Rs, Rx and Ry
2) Leave YnA, YnB unconnected if not used
Rx4
components physically near to the chip.
Ry0
Ry1
Ry2
Ry3
Ry4
Ry5
9510AS–AT42–10/08