Rainbow Electronics MAX5295 - Manual (Page 20)

MAX5290–MAX5295
Buffered, Fast-Settling, Dual, 12-/10-/8-Bit,
Voltage-Output DACs
20 ______________________________________________________________________________________
CONTROL BITS
DATA BITS
DATA
C3
C2
C1
C0
D27
D
26
D25
D
24
D23
D
22
D21
D
20
D19
D
18
D17
D16
D15
D
14
D13
D
12
D11
D
10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
FUNCTION
READ INPUT AND DAC REGISTERS A AND B
DIN
1
1
1
1
0
1
0
X
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
X
X
X
X
X
X
X
X
D
OU
T
R
B
X
X
X
X
X
X
X
X
D
23
D22
D
21
D20
D
19
D18
D
17
D16
D15/
X
D14/
X
D13/
X
D12/
X
D11
D
10
D9
D8
D7
D6
D5
D4
D3/
X
D2/
X
D1/
X
D0/
X
Re
a
d
i np
ut
r eg
i st
e
r A
an
d
D
AC
r eg
i st
e
r A
( al
l 24
b
i ts
) .*
*†
DIN
1
1
1
1
0
1
1
X
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
X
X
X
X
X
X
X
X
D
OU
T
R
B
X
X
X
X
X
X
X
X
D
23
D22
D
21
D20
D
19
D18
D
17
D16
D15/
X
D14/
X
D13/
X
D12/
X
D11
D
10
D9
D8
D7
D6
D5
D4
D3/
X
D2/
X
D1/
X
D0/
X
Re
a
d
i np
ut
r eg
i st
e
r B
an
d
D
AC
r eg
i st
e
r B
( al
l 24
b
i ts
) .*
* †
Table 2c. 24-Bit Read Commands
X
= Don’t care.
**
D23–D12 represent the 12-bit data from the corresponding DAC register. D11–D0 represent the 12-bit data from the corresponding
input register. For
the MAX5292/MAX5293, bits D13, D12, D1, and D0 are don’t-care bits. For the MAX5294/MAX5295, bits D15–D12 and D3–D0 are don’t-c
are bits.
†
During readback, all ones (code FF) must be clocked into DIN for all 24 bits. No command may be issued before all 24 bits have
been clocked out.
CS
must be kept low while all 24 bits are clocked out.
CONTROL BITS
DATA BITS
DATA
C3
C2
C1
C0
D1
D1
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
FUNCTION
UPIO_ AS GPI (GENERAL-PURPOSE INPUT)
D
IN
1
1
1
1
0
0
1
X
XX
XXX
XX
X
DOUTRB
X
X
X
X
X
X
X
X
X
X
RTP2
LF2
LR2
RTP1
LF1
LR1
Read UPIO_ inputs. (Valid only when UPIO1 or UPIO2 is configured as a general-purpose input.) See GPI, GPOL, GPOH section.
OTHER COMMANDS
DIN
1
1
1
1
1
0
0
X
X
X
X
X
X
X
X
X
Command is ignored.
DIN
1
1
1
1
1
0
1
X
X
X
X
X
X
X
X
X
Command is ignored.
DIN
1
1
1
1
1
1
0
X
X
X
X
X
X
X
X
X
Command is ignored.
DIN
1
1
1
1
1
1
1
0
X
X
X
X
X
X
X
X
Command is ignored.
D
IN
11
11
11
11
1
1
1
1
1
1
1
1
16-bit no-op command. All DACs are unaffected.
Table 2b. Advanced-Feature Programming Commands (continued)
X
= Don’t care.