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IDT821054 QUAD PROGRAMMABLE PCM CODEC WITH MPI INTERFACE
INDUSTRIAL TEMPERATURE RANGE
CHclk1[3:0] = 1000:
chclk1 outputs a digital signal with the frequency of 1000/16 Hz;
CHclk1[3:0] = 1001:
chclk1 outputs a digital signal with the frequency of 1000/18 Hz;
CHclk1[3:0] = 1010:
chclk1 outputs a digital signal with the frequency of 1000/20 Hz;
CHclk1[3:0] = 1011:
chclk1 outputs a digital signal with the frequency of 1000/22 Hz;
CHclk1[3:0] = 1100:
chclk1 outputs a digital signal with the frequency of 1000/24 Hz;
CHclk1[3:0] = 1101:
chclk1 outputs a digital signal with the frequency of 1000/26 Hz;
CHclk1[3:0] = 1110:
chclk1 outputs a digital signal with the frequency of 1000/28 Hz;
CHclk1[3:0] = 1111:
the output of chclk1 is set to low permanently.
GREG6: MCLK Selection and Channel Program Enable, Read/Write (25H/A5H)
The higher 4 bits (CE[3:0]) in this register are used to specify the desired channel(s) before addressing local registers or Coe-RAM. The
CE[0] to CE[3] bits indicate the program enable state for Channel 1 to Channel 4 respectively.
CE[0] = 0:
Disabled, Channel 1 can not receive programming commands (default);
CE[0] = 1:
Enabled, Channel 1 can receive programming commands;
CE[1] = 0:
Disabled, Channel 2 can not receive programming commands (default);
CE[1] = 1:
Enabled, Channel 2 can receive programming commands;
CE[2] = 0:
Disabled, Channel 3 can not receive programming commands (default);
CE[2] = 1:
Enabled, Channel 3 can receive programming commands;
CE[3] = 0:
Disabled, Channel 4 can not receive programming commands (default);
CE[3] = 1:
Enabled, Channel 4 can receive programming commands.
The lower 4 bits (Sel[3:0]) in this register are used to select the Master Clock frequency.
Sel[3:0] = 0000:
8.192 MHz
Sel[3:0] = 0001:
4.096 MHz
Sel[3:0] = 0010:
2.048 MHz (default)
Sel[3:0] = 0110:
1.536 MHz
Sel[3:0] = 1110:
1.544 MHz
Sel[3:0] = 0101:
3.072 MHz
Sel[3:0] = 1101:
3.088 MHz
Sel[3:0] = 0100:
6.144 MHz
Sel[3:0] = 1100:
6.176 MHz
GREG7: A/-law, Linear/Compressed Code, Clock Slope and Delay Time Selection, Read/Write (26H/A6H)
The A/-law select bit (A-) selects the companding law:
A- = 0:
A-law is selected (default)
A- = 1:
-law is selected.
The Voice Data Select bit (VDS) defines the format of the voice data:
VDS = 0:
Compressed code (default)
VDS = 1:
Linear code
The Clock Slope bits (CS[2:0]) select single or double clock and clock edges of transmitting and receiving data.
CS[2] = 0:
Single clock (default)
CS[2] = 1:
Double clock
CS[1:0] = 00:
transmits data on rising edges of BCLK, receives data on falling edges of BCLK (default).
CS[1:0] = 01:
transmits data on rising edges of BCLK, receives data on rising edges of BCLK.
b7
b6
b5
b4
b3
b2
b1
b0
Command
R/W
0
1001
01
I/O data
CE[3]
CE[2]
CE[1]
CE[0]
Sel[3]
Sel[2]
Sel[1]
Sel[0]
b7
b6
b5
b4
b3
b2
b1
b0
Command
R/W
0
1001
10
I/O data
A-
VDS
CS[2]
CS[1]
CS[0]
OC[2]
OC[1]
OC[0]
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