参数资料
型号: MMA6556KW
厂商: Freescale Semiconductor
文件页数: 43/53页
文件大小: 0K
描述: IC ACCELEROMETER X AXIS 16QFN
标准包装: 75
轴: X
加速范围: ±120g
灵敏度: 16 LSB/g
电源电压: 3.13 V ~ 5.25 V
输出类型: SPI
接口: SPI
安装类型: 表面贴装
封装/外壳: 16-QFN 裸露焊盘
供应商设备封装: 16-QFN-EP(6x6)
4
SPI Communications
Communication with the device is completed through synchronous serial transfers via SPI. The device is a slave device con-
figured for CPOL = 0, CPHA = 0, MSB first. SPI transfers are completed through a sequence of two phases. During the first
phase, the type of transfer and associated control information is transmitted from the SPI master to the device. Data from the
device is transmitted during the second phase. Any activity on MOSI or SCLK is ignored when CS is negated. Consequently,
intermediate transfers involving other SPI devices may occur between phase one and phase two. Reference Figure 35 .
SCLK
CS
MOSI
Phase One: Command
MISO
Phase One: Response -Previous Command
SCLK
CS
MOSI
Phase Two: Response
T1P1
T2P1
T3P1
T1P2
T2P2
T3P2
MISO
Figure 35. SPI Transfer Detail
MMA655x
Sensor
Freescale Semiconductor, Inc.
43
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