at42qt4120 Quantum Research Group, at42qt4120 Datasheet - Page 2

• Manufacturer Part Number: at42qt4120
• Description: Qfield? 10-bit Touchscreen Sensor Ic
• Manufacturer: Quantum Research Group

1.2
Table 1-1.
2
Pin
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
1
2
3
4
5
6
7
8
9
Pin Listing Description
AT42QT4120
Pin Listing
CHANGE
Name
VREF
SMP
SDA
Y0B
Y1B
Y2B
SCL
RST
Y0A
Y1A
Y2A
Vdd
Vdd
Vdd
Vdd
Vdd
N/C
Vss
Vss
N/C
N/C
Vss
N/C
N/C
Vss
N/C
X0
X1
X2
X3
A0
I
O
OD
Input only
Output only, push-pull
Open drain output
Type
OD
OD
OD
I/O
I/O
I/O
O
P
P
P
P
O
O
P
O
O
O
O
O
O
O
P
P
P
P
O
O
O
O
I
I
I
Reset low; has internal 30k - 60k pull-up
I
2
C-compatible address select
State change notification
Serial Interface Clock
Serial Interface Data
X matrix drive line
X matrix drive line
X matrix drive line
X matrix drive line
Y line connection
Y line connection
Y line connection
Y line connection
Y line connection
Y line connection
Not connected
Supply ground
Supply ground
Not connected
Not connected
Supply ground
Supply ground
Sample output
Not connected
Not connected
Supply ground
Not connected
Comments
Power
Power
Power
Power
Power
I/O
X
P
Input and output
Clock resonator
Ground or power
If Unused, connect To...
Leave open or Vdd
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
–
–
–
–
–
–
–
–
–
–
–
–
–
–
9506AS–AT42–10/08