Z8932120PSC Datasheet, PDF (32/40 Pages) Zilog, Inc. – 16-BIT DIGITAL SIGNAL PROCESSORS

Z89321/371/391
16-Bit Digital Signal Processors
Stereo CODEC Interface
The Z893XX DSP product family CODEC interface pro-
vides direct connection to other CODECs for master or
slave modes, supporting 64 bits of transmission data (16
bits right channel, 16 bits left channel, and 32 bits of con-
figuration information). This configuration information con-
sists of input gain, input MUX, output attenuation, ADC
clipping, and mute and error functions of the CODECs.
Zilog
A key feature of the Z893XX DSP product family is that it
adapts easily to other stereo CODECs, including Crystal
Semiconductor's CS4215 and CS4216 devices (Figure
31).
The 64 bits of data transferred from the CODEC are placed
in four registers, EXT5-1, 5-2, 6-1, and 6-2 (Figure 32 ).
Z89321
/371/391
SCLK
FS0
TxD
RxD
Ferrite Bead
2.0
Audio
Out
(Right)
³ 1.0 mF
40k
0.1 mF 1 mF +
24
15
600
VA
ROUT
0.1 mF 1 mF
4
VD
RIN2
0.47mF
26
Audio
Out
(Left)
0.0022mF
NPO
³ 1.0 mF
40k
16
600
LOUT
0.47mF
LIN2 ²⁸
0.0022mF
NPO
10mF
0.1mF
CS4216
21 _REFBYP
0.47mF
22 _REFGND
RIN1 ²⁷
150
0.01mF
NPO
150
0.01mF
NPO
150
Mode
Setting
43 _SCLK
42 _SSYNC
44 _SDIN
1 _SDOUT
32 _SMODE2
31 _SFS1
30 _SFS2
29 _SMODE1
0.01mF
NPO
0.47mF
LIN1 ²⁷
150
0.01mF
NPO
+5V
Supply
Channel 2
Input
Channel 2
Input
Channel 1
Input
Channel 1
Input
Figure 31. Z893XX and CS4216 CODEC Interface
32
PRELIMINARY
DS97DSP0100