CDB-43L21 Cirrus Logic Inc, CDB-43L21 Datasheet - Page 34

• Manufacturer Part Number: CDB-43L21
• Description: EVAL BOARD FOR CS43L21
• Manufacturer: Cirrus Logic Inc

Specifications of CDB-43L21

• Number Of Dac's: 2
• Number Of Bits: 24
• Outputs And Type: 2, Single Ended
• Sampling Rate (per Second): 96k
• Data Interface: I²C, SPI™
• Dac Type: Voltage
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -10°C ~ 70°C
• Utilized Ic / Part: CS43L21
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 598-1282; CDB-43L21

34
SCL
SDA
SDA
SCL
START
ment bit in MAP allows successive reads or writes of consecutive registers. Each byte is separated by an
acknowledge bit. The ACK bit is output from the
CS43L21
Since the read operation cannot set the MAP, an aborted write operation is used as a preamble. As shown
in
dition. The following pseudocode illustrates an aborted write operation followed by a read operation.
Setting the auto-increment bit in the MAP allows successive reads or writes of consecutive registers. Each
byte is separated by an acknowledge bit.
START
Figure
0
1
CHIP ADDRESS (WRITE)
0
1
1
0
CHIP ADDRESS (WRITE)
Send start condition.
Send 100101x0 (chip address & write operation).
Receive acknowledge bit.
Send MAP byte, auto-increment off.
Receive acknowledge bit.
Send stop condition, aborting write.
Send start condition.
Send 100101x1 (chip address & read operation).
Receive acknowledge bit.
Receive byte, contents of selected register.
Send acknowledge bit.
Send stop condition.
0
2
1
0
from the microcontroller after each transmitted byte.
20, the write operation is aborted after the acknowledge for the MAP byte by sending a stop con-
1
3
0
2
0 1 AD0 0
4
1
3
5
0
4
6
1
5
7
AD0
ACK
6
8
7
9
INCR
0
ACK
10 11
Figure 20. Control Port Timing, I²C Read
Figure 19. Control Port Timing, I²C Write
8
6
INCR
9
5
MAP BYTE
12 13 14 15
10 11
4
6
MAP BYTE
3
5
2
12
4
1
13 14 15
3
16
0
ACK
2
STOP
17 18
START
1
16 17 18
CS43L21
0
19
ACK
1
20 21 22 23 24
CHIP ADDRESS (READ)
0
7
0
19
6
DATA
1
after each input byte is read and is input to the
0
24 25
1
1 AD0 1
0
25
ACK
26
26 27 28
27 28
ACK
7
DATA +1
6
7
DATA
0
1
ACK
0
DATA +1
7
7
DATA +n
0
6
DATA + n
1
7
CS43L21
0
0
ACK
ACK
NO
DS723A1
STOP
STOP