V2.0 – Jan-13
User’s Manual
Page 19 of 41
5 Pin-out Information
5.1 Layout A2100-A
12
13
14
15
16
17
18
19
20
21
22
11
10
9
8
7
6
5
4
3
2
1
GND
GND
GND
GND
GND
GND
GND
GND
GND
1
nRST [IN – 3.3V]
2
BOOTSEL [IN – 1.8V]
3
Vcc 3.3V [PWRIN]
6
GND
7
GND
8
GPIO6 /
SPI CLK
[IN – 3.3V]
9
GPIO7 /
SPI CS
[IN – 3.3V]
10
N.C.
11
N.C.
ANT [IN – RF]
12
ANT_GND
13
RX0 / SPI DI [IN – 3.3V]
22
N.C.
14
TM_GPIO5 [OUT – 1.8V]
16
VANT [IN – 3.3 to 5VDC]
15
4
WAKEUP [OUT – 3.3V]
5
Vout [OUT – 1.8V]
TX0 / SPI DO [OUT – 3.3V]
21
I2C CLK [OUT – 1.8V]
17
I2C DIO [I/O – 1.8V]
18
ON_OFF [IN – 3.3V]
19
ExtInt [IN – 1.8V]
20
Bottom
12
13
14
15
16
17
18
19
20
21
22
11
10
9
8
7
6
5
4
3
2
1
GND
GND
GND
GND
GND
GND
GND
GND
GND
1
nRST [IN – 3.3V]
2
BOOTSEL [IN – 1.8V]
3
Vcc 3.3V [PWRIN]
6
GND
7
GND
8
GPIO6 /
SPI CLK
[IN – 3.3V]
9
GPIO7 /
SPI CS
[IN – 3.3V]
10
N.C.
11
N.C.
ANT [IN – RF]
12
ANT_GND
13
RX0 / SPI DI [IN – 3.3V]
22
N.C.
14
TM_GPIO5 [OUT – 1.8V]
16
VANT [IN – 3.3 to 5VDC]
15
4
WAKEUP [OUT – 3.3V]
5
Vout [OUT – 1.8V]
TX0 / SPI DO [OUT – 3.3V]
21
I2C CLK [OUT – 1.8V]
17
I2C DIO [I/O – 1.8V]
18
ON_OFF [IN – 3.3V]
19
ExtInt [IN – 1.8V]
20
12
13
14
15
16
17
18
19
20
21
22
12
13
14
15
16
17
18
19
20
21
22
11
10
9
8
7
6
5
4
3
2
1
11
10
9
8
7
6
5
4
3
2
1
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
1
nRST [IN – 3.3V]
2
BOOTSEL [IN – 1.8V]
3
Vcc 3.3V [PWRIN]
6
GND
7
GND
8
GPIO6 /
SPI CLK
[IN – 3.3V]
9
GPIO7 /
SPI CS
[IN – 3.3V]
10
N.C.
11
N.C.
ANT [IN – RF]
12
ANT_GND
13
RX0 / SPI DI [IN – 3.3V]
22
N.C.
14
TM_GPIO5 [OUT – 1.8V]
16
VANT [IN – 3.3 to 5VDC]
15
4
WAKEUP [OUT – 3.3V]
5
Vout [OUT – 1.8V]
TX0 / SPI DO [OUT – 3.3V]
21
I2C CLK [OUT – 1.8V]
17
I2C DIO [I/O – 1.8V]
18
ON_OFF [IN – 3.3V]
19
ExtInt [IN – 1.8V]
20
Bottom
“Pin 1” marker
Figure 10: Pin-out information (bottom view) A2100-A
Green Description: Host interface pins
Red Description: MEMS interface pins (Firmware405 just supports KXSD9, Firm-
ware410 supports KXTF9)
Blue Description: Other
Center Ground pins are for shock / vibration resistance purpose.