FXAS21002CQR1 Просмотр технического описания (PDF) - Freescale Semiconductor
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FXAS21002CQR1 Datasheet PDF : 58 Pages
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General Description
Table 1. Pin functions
Pin
Name
Function
1
GND1
Ground
2
INT2 / PWR_CTRL1 Interrupt Output 2 / Power state transition control input
3
INT1
Interrupt Output 1
4
RST_B
Reset input, active low. Connect this pin to VDDIO if unused.
5
GND2
Ground
6
RSVD_GND
Reserved - Must be tied to ground
7
RSVD_GND
Reserved - Must be tied to ground
8
I2C_B / SPI
Digital interface selection pin. This pin must be tied high to select SPI interface
mode, or low to select I2C interface mode.
9
RSVD_GND
Reserved pin—must be tied to ground
10
RSVD_GND
Reserved pin—must be tied to ground
11
SCL/SCLK
I2C / SPI clock
12
SDA / MOSI / SPI_Data I2C data / SPI 4-wire Master Out Slave In / SPI 3-wire data In/Out2
13
SA0/MISO
I2C address bit0 / SPI 4-wire Master In Slave Out
14
GND3
Ground
15
VDD
Supply voltage
16
VREGD
Digital regulator output. Connect a 0.1 μF capacitor between this pin and ground
17
SPI_CS_B
SPI chip select input, active low. This pin must be held logic high when operating
in I2C interface mode (I2C_B/SPI set to ground) to ensure correct operation.
18
VDDIO
Interface supply voltage
19
GND4
Ground
20
RSVD_GND
Reserved - Must be tied to ground
21
RSVD_GND
Reserved - Must be tied to ground
22
RSVD_GND
Reserved - Must be tied to ground
23
RSVD_GND
Reserved - Must be tied to ground
24
RSVD_GND
Reserved - Must be tied to ground
1. INT2/PWR_CTRL becomes a high-impedance input with weak internal pull-up resistor when
CTRLREG3[EXTCTRLEN] = 1; the pull-up resistor is referenced to VDDIO.
2. MOSI becomes a bidirectional data pin when FXAS21002C is operated in 3-wire SPI mode with
CTRL_REG0[SPIW]=1.
1.3 System Connections
The FXAS21002C offers the choice of interfacing with a host processor through
either I2C or SPI interfaces. Figure 3 and Figure 4 show the recommended circuit
connections for implementing both interface options.
3-Axis Digital Angular Rate Gyroscope, Rev. 2.1, 5/2015
5
Freescale Semiconductor, Inc.
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