sca3000-e05pwb VTI Hamlin, sca3000-e05pwb Datasheet - Page 26
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sca3000-e05pwb
Manufacturer Part Number
sca3000-e05pwb
Description
Sca3000 Series 3-axis Accelerometer
Manufacturer
VTI Hamlin
Datasheet
1.SCA3000-E05PWB.pdf
(43 pages)
- Current page: 26 of 43
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4.1.3.2
4.1.3.3
VTI Technologies Oy
www.vti.fi
Example of decremented register read
Example of ring buffer read
Figure 8 presents a decremented read operation where the content of four output registers is read
by one SPI frame. After normal register addressing and one register content reading, the µC keeps
the CSB line low and continues supplying the SCK pulses. After every 8 SCK pulses, the output
data address is decremented by one and the previous acceleration output register's content is
shifted out without parity bits. The parity bit in Figure 4 is calculated and transferred only for the first
data frame. From the X_LSB register address, the SCA3000 jumps to Z_MSB. Decremented
reading is possible only for registers X_LSB ... Z_MSB.
Figure 8. An example of decremented read operation.
An example of output ring buffer read by one SPI frame (ring buffer data length 8 bits) is presented
in Figure 9. The whole ring buffer read procedure is very similar to decremented read described
above. The output ring buffer is addressed (register name BUF_DATA). The SCA3000 sensor
continues shifting out the ring buffer content as long as µC continues supplying the SCK pulses.
Figure 9. An example of output ring buffer read operation.
Doc.Nr. 8257300A.07
SCA3000 Series
Rev.A.07
26/ 43
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