参数资料
型号: MMA8451QT
厂商: Freescale Semiconductor
文件页数: 24/52页
文件大小: 0K
描述: IC ACCELEROMETER 3AXIS 16QFN
标准包装: 490
系列: MMA
轴: X,Y,Z
加速范围: ±2g,4g,8g
灵敏度: 4096 计数/g,2048 计数/g,1024 计数/g
电源电压: 1.95 V ~ 3.6 V
输出类型: 数字
带宽: 800Hz
接口: I²C
安装类型: 表面贴装
封装/外壳: 16-VFQFN
供应商设备封装: 16-QFN(3x3)
0x0A: TRIG_CFG
In the trigger configuration register the bits that are set (logic ‘1’) control which function may trigger the FIFO to its interrupt
and conversely bits that are cleared (logic ‘0’) indicate which function has not asserted its interrupt.
The bits set are rising edge sensitive, and are set by a low to high state change and reset by reading the appropriate source
register.
0x0A: TRIG_CFG Trigger Configuration Register (Read/Write)
Bit 7
Bit 6
Bit 5
Trig_TRANS
Bit 4
Trig_LNDPRT
Bit 3
Trig_PULSE
Bit 2
Trig_FF_MT
Bit 1
Bit 0
Table 17. Trigger Configuration Description
INT_SOURCE
Trig_TRANS
Trig_LNDPRT
Trig_PULSE
Trig_FF_MT
Description
Transient interrupt trigger bit. Default value: 0
Landscape/Portrait Orientation interrupt trigger bit. Default value: 0
Pulse interrupt trigger bit. Default value: 0
Freefall/Motion trigger bit. Default value: 0
0x0B: SYSMOD System Mode Register
The System mode register indicates the current device operating mode. Applications using the Auto-SLEEP/WAKE
mechanism should use this register to synchronize the application with the device operating mode transitions. The System mode
register also indicates the status of the FIFO gate error and number of samples since the gate error occurred.
0x0B: SYSMOD: System Mode Register (Read Only)
Bit 7
FGERR
Bit 6
FGT_4
Bit 5
FGT_3
Bit 4
FGT_2
Bit 3
FGT_1
Bit 2
FGT_0
Bit 1
SYSMOD1
Bit 0
SYSMOD0
Table 18. SYSMOD Description
FIFO Gate Error. Default value: 0.
0: No FIFO Gate Error detected.
FGERR
FGT[4:0]
SYSMOD[1:0]
1: FIFO Gate Error was detected.
Emptying the FIFO buffer clears the FGERR bit in the SYS_MOD register.
See section 0x2C: CTRL_REG3 Interrupt Control Register for more information on configuring the FIFO Gate function.
Number of ODR time units since FGERR was asserted. Reset when FGERR Cleared. Default value: 0_0000
System Mode. Default value: 00.
00: STANDBY mode
01: WAKE mode
10: SLEEP mode
MMA8451Q
Sensors
24
Freescale Semiconductor, Inc.
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