AS1530/AS1531
Data Sheet - Detailed Description
Starting a Conversion
A conversion is started by clocking a control byte into pin DIN.
With CSN low, each rising edge on SCLK clocks a bit from DIN into the internal shift register, starting with the MSB. A
conversion will only start when a logic 1 is written to the START bit of the 8-bit control register.
Figure 21. Single Conversion Timing Waveforms
CSN
tACQ
SCLK
1
4
8
9
12
16
20
24
DIN
RANGE MODE
Start SEL2 SEL1 SEL0
PD1 PD0
High-Z
High-Z
High-Z
SSTRB
RB1
RB2
RB3
High-Z
DOUT
B11 B10 B9 B8 B7
B6
B5 B4 B3 B2 B1 B0
Idle
Acquire
Single Conversion
Idle
Figure 22. Continuous 16-Clock Conversion Timing Waveforms
CSN
DIN
S Control Byte 0
S Control Byte 1
16 1
S Control Byte 2
161
S
...
1
8
12
8
12
8
12
16
SCLK
High-Z
DOUT
B11
B6
B0
B11
B6
B0
B11
B6
Conversion Result 0
Conversion Result 1
Conversion Result 2
High-Z
SSTRB
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