Rainbow Electronics MAX5515 - Manual (Page 15)

MAX5512–MAX5515
Dual, Ultra-Low-Power,
8-Bit, Voltage-Output DACs
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Table 2. Serial Interface Programming Commands
CONTROL BITS INPUT DATA SUB-BITS
C3 C2 C1 C0 D7–D0 S3, S2, S1, S0
FUNCTION
0 0 0 0 XXXXXXXX 0000 No operation; command is ignored.
0 0 0 1 8-bit data 0000
Load input register A from shift register; DAC registers unchanged;
DAC outputs unchanged.
0 0 1 0 8-bit data 0000
Load input register B from shift register; DAC registers unchanged;
DAC outputs unchanged.
0 0 1 1 — — Command reserved. Do not use.
0 1 0 0 — — Command reserved. Do not use.
0 1 0 1 — — Command reserved. Do not use.
0 1 1 0 — — Command reserved. Do not use.
0 1 1 1 — — Command reserved. Do not use.
1 0 0 0 8-bit data 0000
Load DAC registers A and B from respective input registers; DAC
outputs A and B updated; MAX5513/MAX5515 enter normal
operation if in standby or shutdown; MAX5512/MAX5514 enter
normal operation if in shutdown.
1 0 0 1 8-bit data 0000
Load input register A and DAC register A from shift register; DAC
output A updated; Load DAC register B from input register B; DAC
output B updated; MAX5513/MAX5515 enter normal operation if in
standby or shutdown; MAX5512/MAX5514 enter normal operation
if in shutdown.
1 0 1 0 8-bit data 0000
Load input register B and DAC register B from shift register; DAC
output B updated; Load DAC register A from input register A; DAC
output A updated; MAX5513/MAX5515 enter normal operation if in
standby or shutdown; MAX5512/MAX5514 enter normal operation
if in shutdown.
1 0 1 1 — — Command reserved. Do not use.
1 1 0 0
D7, D6,
XXXXXX
0000
MAX5513/MAX5515 enter standby*, MAX5512/MAX5514 enter
shutdown. For the MAX5513/MAX5515, D7 and D6 configure the
internal reference voltage (Table 3).
1 1 0 1
D7, D6,
XXXXXX
0000
MAX5512–MAX5515 enter normal operation; DAC outputs reflect
existing contents of DAC registers. For the MAX5513/MAX5515,
D7 and D6 configure the internal reference voltage (Table 3).
1 1 1 0
D7, D6,
XXXXXX
0000
MAX5512–MAX5515 enter shutdown; DAC outputs set to high
impedance. For the MAX5513/MAX5515, D7 and D6 configure the
internal reference voltage (Table 3).
1 1 1 1 8-bit data 0000
Load input registers A and B and DAC registers A and B from shift
register; DAC outputs A and B updated; MAX5513/MAX5515 enter
normal operation if in standby or shutdown; MAX5512/MAX5514
enter normal operation if in shutdown.
X = Don’t care.
*Standby mode can be entered from normal operation only. It is not possible to enter standby mode from shutdown.