Example Eeprom Write - Analog Devices EVAL-ADuM4138EBZ User Manual

EVAL-ADuM4138EBZ

EXAMPLE EEPROM WRITE

To write data to the EEPROM, the Sim_Trim bit must first be
set. Set this bit by selecting 1 in the Sim Trim field, and clicking
Write/Read Addr:10. This setting results in the Sim_Trim
green indicator lighting up (see Figure 11).
When the Sim_Trim bit is set to 1, write commands to Address 00
or Address 01 affect the operation of the ADuM4138.
The next step to programming the EEPROM is to set the
desired bits in Address 00 and Address 01. In this example, Bit 0
of the GAIN_1 field is set to 1. When it is set to 1, clicking
Write/Read Addr:00 results in the Addr:00 Output field
showing that the value was written to the register. At this time,
User Guide
Figure 10. Address Bits Are Being Read Back
Rev. 0 | Page 11 of 18
the GAIN_1 EEPROM register is not yet programmed. Note
that Sim_Trim is still 1 (see Figure 12).
To write Address 00 data to EEPROM, set the Prog Busy field
to 1, and click Write/Read Addr:10 (see Figure 13).
The write/read button performs a write and then a read as
normal. The Prog_Busy green indicator is usually lit up. This
state is because the read command occurs quickly after the
write, and the Prog_Busy bit in the
device is being programmed. Click Read Addr:10 after this
programming, and once the Prog_Busy bit changes to 0, the
EEPROM is programmed. The programming takes approximately
10 μs; therefore, a human user generally cannot click the read
button fast enough to see a 1 in the Prog Busy field the second
time, but an automated program might (see Figure 14).
UG-1194
ADuM4138 is 1 while the