IDT821068PX IDT, Integrated Device Technology Inc, IDT821068PX Datasheet - Page 28

• Manufacturer Part Number: IDT821068PX
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: General Purposer

Specifications of IDT821068PX

• Number Of Adc's: 8
• Number Of Dac's: 8
• Interface Type: Serial
• Power Supply Type: Analog/Digital
• Operating Supply Voltage (min): 4.75V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.25V
• Pin Count: 128
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Screening Level: Industrial
• Package Type: PQFP
• Mounting: Surface Mount
• Lead Free Status / Rohs Status: Not Compliant

19. Level Meter Channel Select, Level Meter Mode Select, Level Meter On/off, Teletax Pulse Frequency and Dual Tone Output In-
vert (33H/B3H), Read/Write
20. FSK Flag Length (34H/B4H), Read/Write
value is valid from 0 to 255(d). The default value is 0(d). If 0(d) is selected, no flag signal will be sent.
21. FSK Data Length (35H/B5H), Read/Write
Any value larger than 64(d) will be taken as 64(d) by the CPU.
Global Command 24) is set to ‘1’, the mark signal will be sent; while Mark After Send is set to ‘0’, the transmission of mark signal will be termi-
nated.
22. FSK Seizure Length (36H/B6H), Read/Write
SL[7:0], which is valid from 0 to 255(d), corresponding to Seizure Length 0 to 510). The default value is 0(d). When 0(d) is selected, no seizure
signal will be sent.
IDT821068 OCTAL PROGRAMMABLE PCM CODEC
Level Meter Channel Select bits (CS[2:0]) select the channel, data on which will be level metered.
Level Meter Mode Select bit (L/C) determines the mode of level meter operation.
Level Meter On/off bit (LMO) enables the level meter.
Teletax Pulse Frequency bit (TF) selects the frequency of teletax pulse.
Dual Tone Output Invert bit (TOI) determines whether output tone signal will be inverted or not.
Flag Length bits (FL[7:0]) determine the number of flag bits ‘1’ which will be transmitted between the transmission of message bytes. The
Data Length bits (WL[7:0]) determine the number of all the data bytes which will be transmitted except flag. The value is valid from 0 to 64(d).
The default value of this register is 0(d). When 0(d) is selected, none of the word data will be sent out. When Mark After Send (MAS bit in
Seizure Length bits (SL[7:0]) determine the number of ‘01’ pairs which represent seizure phase (Seizure Length is two times of the value in
CS = 000: Channel 1 is selected (default);
CS = 001: Channel 2 is selected;
CS = 010: Channel 3 is selected;
CS = 011: Channel 4 is selected;
CS = 100: Channel 5 is selected;
CS = 101: Channel 6 is selected;
CS = 110: Channel 7 is selected;
CS = 111: Channel 8 is selected.
L/C = 0: Message mode is selected. Compressed PCM will be output to LMRH transparently (default);
L/C = 1: Meter mode is selected. Linear PCM data will be metered and output to LMRH and LMRL, when data_ready bit in LMRL
LMO = 0: Level meter is disabled (default);
LMO = 1: Level meter is enabled.
TF = 0: Teletax pulse frequency is 16 kHz (default);
TF = 1: Teletax pulse frequency is 12 kHz.
TOI = 0: no inversion (default);
TOI = 1: output signal is inverted.
Command
Command
Command
Command
I/O data
I/O data
I/O data
I/O data
register is ‘1’.
WL[7]
SL[7]
FL[7]
R /W
R /W
R /W
R /W
b7
b7
b7
b7
R
WL[6]
SL[6]
FL[6]
TOI
b6
b6
b6
b6
0
0
0
0
WL[5]
SL[5]
FL[5]
b5
b5
b5
TF
b5
1
1
1
1
28
WL[4]
SL[4]
FL[4]
LMO
b4
b4
b4
b4
1
1
1
1
WL[3]
SL[3]
FL[3]
b3
L/C
b3
b3
b3
0
0
0
0
WL[2]
SL[2]
FL[2]
CS[2]
b2
b2
b2
b2
1
1
0
INDUSTRIAL TEMPERATURE RANGE
0
WL[1]
SL[1]
CS[1]
FL[1]
b1
b1
b1
1
b1
0
0
1
WL[0]
SL[0]
FL[0]
CS[0]
b0
b0
b0
b0
0
0
1
1