ADIS16204/PCBZ Analog Devices Inc, ADIS16204/PCBZ Datasheet - Page 12

• Manufacturer Part Number: ADIS16204/PCBZ
• Description: BOARD EVAL FOR ADIS16204/PCB
• Manufacturer: Analog Devices Inc
• Series: iMEMS®, iSensor™r

Specifications of ADIS16204/PCBZ

• Sensor Type: Accelerometer, 2 Axis
• Sensing Range: ±37g, ±70g
• Interface: SPI Serial
• Sensitivity: 8.407mg/LSB, 17.125mg/LSB
• Voltage - Supply: 3 V ~ 3.6 V
• Embedded: No
• Utilized Ic / Part: ADIS16204
• Silicon Manufacturer: Analog Devices
• Application Sub Type: Accelerometer - Dual-Axis
• Kit Application Type: Sensing - Motion / Vibration / Shock
• Silicon Core Number: ADIS16204
• Kit Contents: Board
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: ADISUSBZ - KIT EVAL ADIS W/SOFTWARE USBADISEVALZ - KIT PC EVALUATION W/SOFTWARE
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

ADIS16204
BASIC OPERATION
The ADIS16204 is designed for simple integration into industrial
system designs, requiring only a power supply and a 4-wire,
industry-standard SPI. The SPI provides access to the ADIS16204’s
register structure, which controls access to all sensor output data
and controls for the device’s programmable features. Each register
in each register consist of an upper byte (Bit 8 to Bit 15) and a
lower byte (Bit 0 to Bit 7), each of which has its own 6-bit address.
SERIAL PERIPHERAL INTERFACE
The ADIS16204 SPI port includes four signals: chip select
( CS ), serial clock (SCLK), data input (DIN), and data output
(DOUT). The CS line enables the ADIS16204 SPI port and
frames each SPI event. When this signal is high, the DOUT
lines are in a high impedance state and the signals on DIN
and SCLK have no impact on operation. A complete data frame
contains 16 clock cycles. Because the SPI port operates in full
duplex mode, it supports simultaneous, 16-bit receive (DIN)
and transmit (DOUT) functions during the same data frame.
See Table 2, Figure 2, and Figure 3 for detailed timing and
operation of the SPI port.
is 16 bits in length and has its own unique bit map. The 16 bits
DOUT
SCLK
SCLK
W/R BIT
DIN
DIN
CS
CS
WRITE = 1
READ = 0
W/R
BASED ON PREVIOUS COMMAND
ZERO
ADDRESS
A5
DATA FRAME
REGISTER ADDRESS
A4
Figure 22. SPI Sequence for Read Commands
A3
DON’T CARE
A2
Figure 21. DIN Bit Sequence
Rev. B | Page 12 of 24
A1
DATA FRAME
A0
DC7
Writing to Registers
Figure 21 displays a typical data frame for writing a command
to a control register. In this case, the first bit of the DIN sequence is
a 1, followed by a 0, the 6-bit address, and the 8-bit data command.
Because each write command covers a single byte of data, two
data frames are required when writing to the entire 16-bit space of
a register. The DIN bits clock into the ADIS16204 on the rising
edge of SCLK.
Reading from Registers
Reading the contents of a register requires a modification to
the sequence in the DIN sequence shown in Figure 21. As
shown in Figure 22, the first two bits in the DIN sequence are 0,
followed by 6 address bits. Each register has two addresses (upper,
lower), but either one can be used to access its entire 16 bits of
data. The final 8 bits of the DIN sequence are irrelevant and can be
counted as don’t cares during a read command. During the next
data frame, the DOUT sequence contains the register’s 16-bit
data. The ADIS16204 clocks out the first DOUT bit on the falling
edge of the CS line and clocks out the rest of the DOUT bits on the
falling edges of the SCLK signal. Although a single read command
requires two separate data frames, the full duplex mode mini-
mizes this overhead, requiring only one extra data frame when
continuously sampling.
DON’T CARE FOR READ COMMANDS
DC6
DATA FOR WRITE COMMANDS
DC5 DC4
16-BIT REGISTER CONTENTS
DATA FRAME
NEXT COMMAND
DC3 DC2 DC1
DC0