Datasheet

ADN2850 Data Sheet
Rev. E | Page 20 of 28
Table 17. Using Left-Shift by One to Increment 6 dB Steps
SDI SDO Action
0xC0XXXX
0xXXXXXX Moves Wiper 1 to double the
present data contained in the
RDAC1 register.
0xC1XXXX
0xC0XXXX Moves Wiper 2 to double the
present data contained in the
RDAC2 register.
Table 18. Storing Additional User Data in EEMEM
SDI SDO Action
0x32AAAA
0xXXXXXX Stores Data 0xAAAA in the extra
EEMEM location USER1. (Allowable to
address in 13 locations with a
maximum of 16 bits of data.)
0x335555
0x32AAAA Stores Data 0x5555 in the extra
EEMEM location USER2. (Allowable to
address in 13 locations with a
maximum of 16 bits of data.)
Table 19. Reading Back Data from Memory Locations
SDI SDO Action
0x92XXXX
0xXXXXXX Prepares data read from USER1
EEMEM location.
0x00XXXX 0x92AAAA NOP Instruction 0 sends a 24-bit word
out of SDO, where the last 16 bits
contain the contents in USER1 EEMEM
location.
Table 20. Reading Back Wiper Settings
SDI SDO Action
0xB00200
0xXXXXXX Writes RDAC1 to midscale.
0xC0XXXX 0xB00200 Doubles RDAC1 from midscale to full
scale.
0xA0XXXX 0xC0XXXX Prepares reading wiper setting from
RDAC1 register.
0xXXXXXX 0xA003FF Reads back full-scale value from SDO.
EVAL-ADN2850SDZ EVALUATION KIT
Analog Devices, Inc., offers a user-friendly EVA L -
ADN2850SDZ evaluation kit that can be controlled by a PC in
conjunction with the DSP platform. The driving program is
self-contained; no programming languages or skills are needed.