Freescale Semiconductor FRDM-FXS-MULTI 데이터 시트
Table 1. Pin functions (continued)
Pin
Name
Function
22
Reserved
Reserved - Must be tied to ground
23
Reserved
Reserved - Must be tied to ground
24
Reserved
Reserved - Must be tied to ground
1. MOSI becomes a bidirectional data pin when FXAS21000 is operated in 3-wire SPI mode with
CTRL_REG0[SPIW] = 1.
1.3 System Connections
The FXAS21000 offers the choice of connecting to a host processor through either I
2
C
or SPI interfaces.
show the recommended circuit connections for
implementing both options.
1.3.1 Typical Application Circuit—I
2
C Mode
1
2
3
4
5
6
7
14
13
15
16
17
18
19
V
DDIO
(1.62 – 3.6 V)
SAO
0.1 μF
0.1 μF
GND
INT
2
INT
1
RST_B
GND
GND
V
DDIO
SPI_CS_B
V
REGD
V
DD
GND
SAO
SDA
VDDIO
4.7 KΩ
SCL
V
DDIO
FXAS21000
INT
2
INT
1
Reserved
Reserved
4.7 KΩ
(Optional)
V
DDIO
RST_B
Note: Connect RST_B pin to V
DDIO
if unused in the application. A pull-up
resistor may be used if desired.
resistor may be used if desired.
V
DD
(1.95 – 3.6 V)
8
9
10
11
12
20
21
24
22
23
SCL
SD
A
R
eser
ved
R
eser
ved
R
eser
ved
R
eser
ved
R
eser
ved
R
eser
ved
R
eser
ved
R
eser
ved
1.0 μF
4.7 KΩ
0.1 μF
Figure 3. I
2
C mode electrical connections
General Description
6
Xtrinsic 3-Axis Digital Angular Rate Gyroscope, Rev1.2, 7/2014.
Freescale Semiconductor, Inc.