decaWave DW1000 - Figure 28: Flow Chart for Direct Read of

DW1000 User Manual
© Decawave Ltd 2017
Version 2.12
Page 170 of 242
7.2.45.3 Sub-Register 0x2C:03 – AON_RDAT
ID
Length
(octets)
Type
Mnemonic
Description
2C:03
1
RW
AON_RDAT
AON Direct Access Read Data Result
Register file: 0x2C – Always-on system control, sub-register 0x03 is an 8-bit register used to return the result
of a direct access read of a location in the AON memory array. The location to read from is specified by Sub-
Register 0x2C:04 – AON_ADDR and the read is initiated using the DCA_READ control bit in Sub-Register
0x2C:02 – AON_CTRL.
7.2.45.4 Reading from a specified address within AON memory
Figure 28 shows the procedural flow for reading from specified address in AON memory:
Figure 28: Flow chart for direct read of AON address
Ensure that the SPI clock
frequency is set < 3MHz.
YES
NO
Want to do
another read
?
Write Address to access into
Register 2C:04 – AON_ADDR
Set DCA_ENAB by writing octet
0x80 into Reg 2C:02 – AON_CTRL
Now also set DCA_READ by
writing octet 0x88 into Reg 2C:02
Read Result data from
Register 2C:03 – AON_RDAT
Clear DCA_ENAB and DCA_READ
by writing 0x00 into Reg 2C:02
DONE:
Return Result read from Address
PROC: read AON CAS @Address