1.1 Wiring
Table 1.1 Pinlist
Function
32-QFN 48 SSOP
Name
Type
Notes
If Unused
Pin
Pin
1
-
2
3
33
34
35
36
SS
n/c
/RST
Vdd
OD
-
I
Spread spectrum
Spread spectrum drive
-
100K✡ resistor to Vss
-
Open
Vdd
-
Reset input
Power
Active low reset
+2.8 ~ +5.0V
Pwr
Resistor to Vdd and optional
spread spectrum RC network
Leave open
4
5
-
37
OSC
n/c
I
-
-
Oscillator
-
-
38
39, 40,
41, 42
-
-
n/c
-
Open
Sense pin and
option select
Sense pin
Sense pin and
option select
Sense pin
Sense pin and
option select
Sense pin
Sense pin and
option select
Sense pin
To Cs0 and/or
option resistor
To Cs0 + Key
To Cs1 and/or
option resistor*
To Cs1 + Key
To Cs2 and/or
option resistor*
To Cs2 + Key
To Cs3 and/or
option resistor*
To Cs3 + Key
To Cs4
Open or
option resistor*
Open
Open or
option resistor*
Open
Open or
option resistor*
6
7
43
44
45
46
47
48
1
SNS0
SNS0K
SNS1
I/O
I/O
I/O
I/O
I/O
I/O
I/O
8
9
SNS1K
SNS2
10
11
12
SNS2K
SNS3
Open
Open or
option resistor*
13
14
15
2
3
4
SNS3K
SNS4
SNS4K
I/O
I/O
I/O
Open
Open
Open
Open or
Sense pin
Sense pin
To Cs4 + Key
To Cs5 and/or
option resistor *
To Cs5 + Key
To Cs6 and/or
option resistor*
To Cs6 + Key and/or
mode resistor†
Sense pin and
option select
Sense pin
Sense pin and
option select
Sense pin and
mode select
16
17
18
5
6
7
SNS5
SNS5K
SNS6
I/O
I/O
I/O
option resistor*
Open
Open or
option resistor*
Open or
19
20
8
9
SNS6K
SNS7
I/O
I/O
mode resistor†
Open or mode
resistor† or option
resistor*
Sense pin and mode
or option select
To Cs7 and/or mode resistor†
or option resistor*
21
-
10
SNS7K
n/c
I/O
-
Sense pin
-
To Cs7 + Key
-
Open
11, 12, 13,
14, 15, 16
Open
22
-
23
24
-
25
26
27
28
29
17
18, 19, 20
21
22
23, 24
25
Vss
n/c
Pwr
-
I
O/OD
-
I/O
I/O
I/O
I/O
-
Ground
-
Sync In or LP In
Detect Status
-
0V
-
Open
Vdd or Vss**
Open
-
Rising edge sync or LP pulse
See Table 1.4
-
SYNC/LP‡
DETECT
n/c
Open
Open
Open
Open
Open
Open
SNS8
SNS8K
SNS9
SNS9K
n/c
Sense pin
Sense pin
Sense pin
Sense pin
-
To Cs8
To Cs8 + Key
To Cs9
To Cs9 + Key
-
26
27
28
29
0 = a key state has changed
Requires pull-up
Requires pull-up to Vdd
Input for 2W mode
30
30
/CHANGE
OD
State changed
100K✡ resistor to Vss
31
32
31
32
1W
RX
I/OD
I
1W mode serial I/O
2W Receive
-
Vdd
Pin Type
I
CMOS input only
CMOS I/O
I/O
OD
CMOS open drain output
I/OD
O/OD
Pwr
CMOS input or open drain output
CMOS push pull or open-drain output (option selected)
Power / ground
Notes
† Mode resistor is required only in Simplified mode (see Figure 1.2)
* Option resistor is required only in Full Options mode (see Figure 1.1)
‡ Pin is either Sync or LP depending on options selected (functions SL_0, SL_1, see Figure 1.1)
** See text
Lq
3
QT1101 R4.06/0806
QUANTUM [ QUANTUM RESEARCH GROUP ]
