at42qt1481 ATMEL Corporation, at42qt1481 Datasheet - Page 5

• Manufacturer Part Number: at42qt1481
• Description: 48-key Qmatrix Ic
• Manufacturer: ATMEL Corporation

1.3
Figure 1-1.
9621B–AT42–06/11
Schematic
VDD
Vunreg
+
Typical Circuit
Creg1
WAKE
SYNC
16 MHz 3-TERM
MOSI
MISO
SCLK
DRDY
RESONATOR
VREG
SS
Rx
Tx
4.7k
Creg2
Re
SCOPE
•
•
•
•
+
VDD
Section 2.6 on page
Section 2.7 on page
Section 2.9 on page
Section 2.12 on page
Figure 1-1
C1
43
44 SS
10 Tx
11 WS
41
40
18
28
39
1
2
3 SCK
9 Rx
4
8
7
6
RST
S_SYNC /
Dbg_Clk
MOSI
MISO
DRDY
XT1
XT2
Vss
Vss
Vss
Vss
STATUS /
Dbg_Data
check the following sections for component values:
C2
QT1481
9: Cs capacitors (Cs0 – Cs5)
10: Sample resistors (Rs0 – Rs5)
11: Matrix resistors (Rx0 – Rx7, Ry0 – Ry5)
C3
14: Power Supply
Y0A
Y0B
Y1A
Y1B
Y2A
Y2B
Y3A
Y3B
Y4A
Y4B
Y5A
Y5B
X7
X6
X5
X4
X3
X2
X1
X0
26
25
24
23
22
21
20
19
16
30
15
31
14
32
13
33
34
35
36
37
Rs5
Rs4
Rs3 Rs2 Rs1
Rx7
Rx3
Rx6
Rx2
Rs0
Cs0
Cs1
Cs2
Cs3
Cs4
Cs5
Rx5
Rx1
Rx4
Rx0
Ry0
Ry1
Ry2
Ry3
Ry4
Ry5
AT42QT1481
X7
X6
X5
X4
X3
X2
X1
X0
Y0
Y1
Y2
Y3
Y4
Y5
5