CS42435
2. PIN DESCRIPTIONS - HARDWARE MODE
52 51 50 49 48 47 46 45 44 43 42 41 40
TEST
TEST
AIN1+
39
38
1
AIN1-
2
VA
MFREQ
TEST
3
37
36
35
34
33
VQ
4
AGND
AOUT8-
AOUT8+
AOUT7+
AOUT7-
AOUT6-
AOUT6+
AOUT5+
RST
VLC
5
6
CS42435
FS
7
VD
8
32
31
30
29
28
27
DGND
VLS
9
10
11
12
SCLK
MCLK
ADC_SDOUT
AOUT5-
13
14 15 16 17 18 19 20 21 22 23 24 25 26
Pin Name
TEST
#
Pin Description
1,2,4 Test - These pins are inputs used for test purposes only. They must be tied high or low.
MFREQ
RST
3
5
MCLK Frequency (Input) - Sets the required frequency range of the input master clock.
Reset (Input) - The device enters a low-power mode and all internal registers are reset to their
default settings when low.
Control Port Power (Input) - Determines the required signal level for the control port interface.
See “Digital I/O Pin Characteristics” on page 8.
VLC
6
FS
7
8
Frame Sync (Input) - Signals the start of a new TDM frame in the TDM digital interface format.
Digital Power (Input) - Positive power supply for the digital section.
VD
DGND
9,18 Digital Ground (Input) - Ground reference for the digital section.
Serial Port Interface Power (Input) - Determines the required signal level for the serial port inter-
faces. See “Digital I/O Pin Characteristics” on page 8.
VLS
10
SCLK
11
Serial Clock (Input) - Serial clock for the serial audio interface. Input frequency must be 256 x Fs.
MCLK
12 Master Clock (Input) - Clock source for the delta-sigma modulators and digital filters.
13 Serial Audio Data Output (Output) - TDM output for two’s complement serial audio data.
14 DAC Serial Audio Data Input (Input) - TDM Input for two’s complement serial audio data.
ADC_SDOUT
DAC_SDIN
Auxiliary Left/Right Clock (Output) - Determines which channel, Left or Right, is currently active
on the Auxiliary serial audio data line.
AUX_LRCK
AUX_SCLK
AUX_SDIN
15
16 Auxiliary Serial Clock (Output) - Serial clock for the Auxiliary serial audio interface.
Auxiliary Serial Input (Input) - The 42435 provides an additional serial input for two’s comple-
ment serial audio data.
17
DS685F1
9
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