821054PQF IDT, Integrated Device Technology Inc, 821054PQF Datasheet - Page 24

• Manufacturer Part Number: 821054PQF
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of 821054PQF

• Single Supply Voltage (typ): 5V
• Single Supply Voltage (min): 4.75V
• Single Supply Voltage (max): 5.25V
• Package Type: PQFP
• Lead Free Status / RoHS Status: Not Compliant

IDT821054 QUAD PROGRAMMABLE PCM CODEC WITH MPI INTERFACE
3.4.2
For the global and local registers described below, it should be noted that:
1. R/W = 0, Read command. R/W = 1, Write command.
2. The reserved bit(s) in the registers must be filled in ‘0’ in write operation and be ignored in read operation.
GREG1: No Operation, Write (A0H); Version Number, Read (20H)
GREG2: Interrupt Clear, Write Only (A1H)
GREG3: Software Reset, Write Only (A2H)
GREG4: Hardware Reset, Write Only (A3)
GREG5: Chopper Clock Selection, Read/Write (24H/A4H)
GLOBAL REGISTERS LIST
By applying a read operation (20H) to this register, users can read out the version number of the IDT821054. The default value is 01H.
To write to this register (no operation), a data byte of FFH must follow the write command (A0H) to ensure proper operation.
All interrupts on SLIC I/O will be cleared by applying a write operation to this register. Note that a data byte of FFH must follow the write
command (A1H) to ensure proper operation.
A write operation to this register resets all local registers, but does not reset global registers and RAM. Note that when writing to this
register, a data byte of FFH must follow the write command (A2H) to ensure proper operation.
A write operation to this register is equivalent to setting the RESET pin to logic low (Refer to
for details). Note that when applying this write command, a data byte of FFH must follow to ensure proper operation.
This register is used to select the frequency of the CHclk2 and CHclk1 output signals.
CHclk2[1:0] = 00:
CHclk2[1:0] = 01:
CHclk2[1:0] = 10:
CHclk2[1:0] = 11:
CHclk1[3:0] = 0000:
CHclk1[3:0] = 0001:
CHclk1[3:0] = 0010:
CHclk1[3:0] = 0011:
CHclk1[3:0] = 0100:
CHclk1[3:0] = 0101:
CHclk1[3:0] = 0110:
CHclk1[3:0] = 0111:
Command
Command
Command
Command
Command
I/O data
R/W
R/W
b7
b7
b7
b7
b7
1
1
1
Reserved
chclk2 outputs a digital signal with the frequency of 256 kHz;
the output of chclk2 is set to high permanently (default);
chclk2 outputs a digital signal with the frequency of 512 kHz;
chclk2 outputs a digital signal with the frequency of 16384 kHz;
the output of chclk1 is set to high permanently (default);
chclk1 outputs a digital signal with the frequency of 1000/2 Hz;
chclk1 outputs a digital signal with the frequency of 1000/4 Hz;
chclk1 outputs a digital signal with the frequency of 1000/6 Hz;
chclk1 outputs a digital signal with the frequency of 1000/8 Hz;
chclk1 outputs a digital signal with the frequency of 1000/10 Hz;
chclk1 outputs a digital signal with the frequency of 1000/12 Hz;
chclk1 outputs a digital signal with the frequency of 1000/14 Hz;
b6
b6
b6
b6
b6
0
0
0
0
0
Chclk2[1]
b5
b5
b5
b5
b5
1
1
1
1
1
Chclk2[0]
24
b4
b4
b4
b4
b4
0
0
0
0
0
Chclk1[3]
b3
b3
b3
b3
b3
0
0
0
0
0
Chclk1[2]
b2
b2
b2
b2
b2
0
0
0
0
1
INDUSTRIAL TEMPERATURE RANGE
“3.3 Default State After Reset” on page 21
Chclk1[1]
b1
b1
b1
b1
b1
0
0
1
1
0
Chclk1[0]
b0
b0
b0
b0
b0
0
1
0
1
0