at42qt1481 ATMEL Corporation, at42qt1481 Datasheet - Page 2

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

1. Pinout and Schematic
1.1
1.2
Table 1-1.
2
Pin
10
11
1
2
3
4
5
6
7
8
9
Pinout Configuration
Pin Descriptions
AT42QT1481
Pin Listing
Name
MOSI
MISO
SCK
RST
Vdd
XT2
XT1
Vss
WS
Rx
Tx
MISO
MOSI
Type
SCK
RST
XT2
XT1
Vdd
Vss
WS
O
P
P
O
O
TX
RX
I
I
I
I
I
I
1
2
3
4
5
6
7
8
9
10
11
44 43 42 41 40 39 38 37 36
12 13 14
SPI data input
SPI data output
SPI clock input
Reset low; has internal 30 k – 60 k pull-up resistor.
This pin should be controlled by the host.
Power
Ground
16 MHz 3-terminal resonator
UART receive data input
UART transmit data; has internal 20 k – 50 k pull-up
resistor
Wake-up from sleep input and/or sync input
15
QT1481
16
17
18
Comments
19 20
35
21
34
22
33
32
31
30
29
28
27
26
25
24
23
Y3B
Y2B
Y1B
Y0B
Vdd
Vss
Vdd
X7
X6
X5
X4
Leave open
Leave open
Vdd
Vdd
–
–
Leave open
–
Vdd
Leave open
Vdd
If Unused, connect To...
9621B–AT42–06/11