Техническая Спецификация для Freescale Semiconductor Accelerometer Cube Demo MMA9559LKUBE MMA9559LKUBE
Модели
MMA9559LKUBE
MMA955xL
Sensors
Freescale Semiconductor, Inc.
Freescale Semiconductor, Inc.
7
3
General Description
3.1
Functional Overview
The MMA955xL device consists of a 3-axis, MEMS accelerometer and a mixed-signal ASIC with an integrated, 32-bit CPU. The
mixed-signal ASIC can be utilized to measure and condition the outputs of the MEMS accelerometer, internal temperature sensor,
or a differential analog signal from an external device.
mixed-signal ASIC can be utilized to measure and condition the outputs of the MEMS accelerometer, internal temperature sensor,
or a differential analog signal from an external device.
The calibrated, measured sensor outputs can be read via the slave I
2
C or SPI port or utilized internally within the MMA955xL
platform.
Figure 1. Platform block diagram
A block level view is shown in the preceding figure and can be summarized at a high level as an analog/mixed-mode subsystem
associated with a digital engine:
associated with a digital engine:
• The analog subsystem is composed of:
– A 3-axis transducer that is an entirely passive block including the MEMS structures.
– An Analog Front End (AFE) with the following:
• A capacitance-to-voltage converter (CVC)
• An analog-to-digital converter
• A temperature sensor
• An analog-to-digital converter
• A temperature sensor
• The digital subsystem is composed of:
– A 32-bit, ColdFire V1 CPU with a Background-Debug Module (BDM)
– Memory: RAM, ROM, and flash
– Rapid GPIO (RGPIO) port-control logic
– Timer functions include:
• Modulo timer module (MTIM16)
• Programmable Delay Timer (PDB)
• Programmable Delay Timer (PDB)
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