Application

What is the Hardware Interface of Ericco MEMS Gyro

High Performance MEMS Gyroscope

1.Application products:

North seeking MEMS Gyro ER-MG2-100

Navigation grade MEMS Gyro ER-MG2-300/400

Tactic grade MEMS Gyro ER-MG-067

Low cost MEMS Gyro ER-MG-056

2.SPI timing

MEMS gyro sensor data is realized by accessing and reading the specified register address.Similarly, control of the MEMS gyro is achieved by writing the value to the specified register.

MEMS gyro realizes register access through 4-line SPI hardware interface timing sequence, and writes or reads registers with specified address. The SPI interface of MEMS gyro adopts Mode 3 timing sequence type for slave Mode. That is, CPOL = 1, CPHA = 1. Before CS was pulled down, the default level of Clock was high, and the data was read on the rising edge.

SPI timing parameters of mems gyro

Figure 6 SPI timing parameters

SymbolParametersConditionMinTypicalMaxUnit
FsclkSPI clock frequencyDIN/DOUT maximum load 20pF/48MHz
t1Slice to clock edge/200//ns
t2

SCLK after the edge

DOUT valid time

///62.5ns
t3SCLK rises along the previous DIN establishment time/10//ns
t4SCLK rises after DIN holds time/10//ns
Tdr,TdfDOUT rise and fall times, not shownVIO 3.3V/10/ns
t5

SCLK after the edge

SSB high level time

/200//ns
t6Two SPI access intervals/500//ns

Table 2 SPI timing parameters

2.SPI read write control

SPI single byte write timing-mems gyro

Figure 7 SPI single byte write timing

SPI single byte read timing-mems gyro

Figure 8 SPI single byte read timing

SPI multi-byte write timing-mems gyro

Figure 9 SPI multi-byte write timing

SPI multi-byte read timing of mems gyro

Figure 10 SPI multi-byte read timing

Remark:

W/R:SPI read and write control bits
/0:SPI write operation
/1:SPI read operation
INC:SPI reads and writes single – byte, multi – byte instructions
/0:SPI single byte reads and writes
/1:SPI address multibyte reads and writes
A5~A0:SPI operation address
/range:0x00 ~ 0x3F
D7~D0:SPI operates on data
/range:0x00 ~ 0xFF

More Technical Questions

Products in Article

High Performance North Seeking MEMS Gyroscope
High Performance North Seeking MEMS Gyroscope
High Precision Navigation MEMS Gyroscope
High Precision Navigation MEMS Gyroscope
3-Axis North-Seeking MEMS Gyro
3-Axis North-Seeking MEMS Gyro
High Performance MEMS Gyroscope
High Performance MEMS Gyroscope
Economical MEMS Gyroscope
Economical MEMS Gyroscope
High Performance Navigation MEMS Gyro
High Performance Navigation MEMS Gyro
Share article:
Ask a Question

    Menu