Configuration Mode Command (Receive) Communications Protocol - Analog Devices ADXL180 iMEMS Manual

ADXL180
CONFIGURATION MODE COMMAND (RECEIVE)
COMMUNICATIONS PROTOCOL
The 8-bit configuration register data is passed to the ADXL180
with a read/write command bit, a 4-bit configuration register
address, and a parity bit as shown in Figure 37. The read/write
bit is set to indicate the desired action. A 0 indicates a write
Table 42. Configuration Mode Transmit Data Bit Mapping
DB15 DB14 DB13 DB12
Parity Addr 3 Addr 2 Addr 1
RECEIVE DATA FRAME (14 BITS)
TRANSMITTED
FIRST
DATA
0 1 2 3
Figure 37. Configuration Mode Command (Receive) Data Frame
DB11 DB10 DB9 DB8
Addr 0 Data Data Data
Bit 7 Bit 6 Bit 5
(MSB)
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operation and a 1 indicates a read operation. The parity bit is set
for even parity. The parity bit should be set to 0 or 1 to make the
total number of 1s in the data frame even. The data is
transmitted LSB first as shown in Table 42.
ADDRESS
4 5 6 7 0 1 2 3
DB7 DB6 DB5 DB4
Data Data Data Data
Bit 4 Bit 3 Bit 2 Bit 1
R/W P
0 0
DB3 DB2 DB1
Data State State
Bit 0 Vector 2 Vector 1
(LSB)
DB0
State
Vector 0