SCC1300-D04 Datasheet, PDF (20/34 Pages) Murata Manufacturing Co., Ltd. – Combined Gyroscope and 3-axis Accelerometer with digital SPI interfaces

SCC1300-D04
5.2.4 Gyro SPI Mixed Access Mode
It is possible to mix the write and read access modes during one communication frame. Mixed
access mode can be used, for example, to make an interleaved read of both angular rate and
temperature data within the same SPI frame.
Figure 12 shows an example of an interleaved read access:
Figure 12. SPI read interleaving
Each communication word in Figure 12 contains 16 SCK cycles.
After the communication start condition (CSB falling edge), the master sends the address word
ADR1 with the address of the Rate_X register (0x00), R/W = '0' (read access) and odd parity. All
combined, ADR1 = 0x01. In parallel the SCC1300 sends out the status flags.
During transmission of the next address word ADR2, the SCC1300 sends out the register value
specified in ADR1 (Rate_X). On ADR2 the master performs another read access, now to the
TEMP register (0x0A). The address word ADR2 will be 0x51 (TEMP register address 0x0A
shifted to left by 3 bits and added odd parity bit; see Figure 9 for more details). To receive the
register value of the second read access (Temperature), the master has to send an additional
word to the MOSI (Zero Vector with Odd Parity).
Murata Electronics Oy
www.muratamems.fi
Subject to changes
Doc.Nr. 82113100
20/34
Rev. D