CS42432-DMZ Cirrus Logic Inc, CS42432-DMZ Datasheet - Page 35

• Manufacturer Part Number: CS42432-DMZ
• Description: IC, AUDIO CODEC, 24BIT, 200KHZ, MQFP-52
• Manufacturer: Cirrus Logic Inc

Specifications of CS42432-DMZ

• Audio Codec Type: Stereo
• No. Of Adcs: 4
• No. Of Dacs: 6
• No. Of Input Channels: 4
• No. Of Output Channels: 6
• Adc / Dac Resolution: 24bit
• Sampling Rate: 200kSPS
• Ic Interface Type: I2C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DS673F2
5.8
5.8.1
SCL
SDA
Recommended Power-Up Sequence
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.
Send start condition.
Send 10010xx0 (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 10010xx1(chip address & read operation).
Receive acknowledge bit.
Receive byte, contents of selected register.
Send acknowledge bit.
Send stop condition.
Setting the auto-increment bit in the MAP allows successive reads or writes of consecutive registers. Each
byte is separated by an acknowledge bit.
Hardware Mode
1. Hold RST low until the power supply, clocks and hardware control pins are stable. In this state, the
2. Bring RST high. The device will initially be in a low power state with VQ low.
3. The device will initiate the Hardware Mode power up sequence. All features will default to the
4. Following approximately 2000 sample periods, the device is initialized and ready for normal operation.
Note:
ware control pins.
START
Figure
control port is reset to its default settings and VQ will remain low.
Hardware Mode defaults as listed in
pins. VQ will quick-charge to approximately VA/2 and the analog output bias will clamp to VQ.
0
1
CHIP ADDRESS (WRITE)
1
0
During the Hardware Mode power-up sequence, there must be no transitions on any of the hard-
18, the write operation is aborted after the acknowledge for the MAP byte by sending a stop con-
0
2
1
3
0 AD1 AD0 0
4
5
6
7
ACK
8
Figure 18. Control Port Timing, I²C Read
INCR
9
10 11
6
5
MAP BYTE
12 13 14 15
4
3
2
1
Table 2 on page 26
16
0
ACK
STOP
17 18
START
19
1
20 21 22 23 24
CHIP ADDRESS (READ)
0
0
1
0 AD1 AD0 1
according to the Hardware Mode control
25
26 27 28
ACK
7
DATA
0
ACK
DATA +1
7
0
DATA + n
7
0
ACK
CS42432
NO
STOP
35