IDT821054PQF IDT, Integrated Device Technology Inc, IDT821054PQF Datasheet - Page 14

• Manufacturer Part Number: IDT821054PQF
• Description: IC PCM CODEC QUAD MPI 64-PQFP
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: PCM Codec/Filterr

Specifications of IDT821054PQF

• Data Interface: PCM Audio Interface
• Number Of Adcs / Dacs: 4 / 4
• Sigma Delta: No
• Voltage - Supply, Analog: 4.75 V ~ 5.25 V
• Voltage - Supply, Digital: 4.75 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-MQFP, 64-PQFP
• 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: Contains lead / RoHS non-compliant
• Other names: 821054PQF

IDT821054 QUAD PROGRAMMABLE PCM CODEC WITH MPI INTERFACE
corresponding hexadecimal values before being written to the Coe-
RAM. Refer to
address of the tone coefficients.
generators. When only one tone generator is enabled, or dual tone
generators produce the same tone signal and frequency of the tone
meets the ring signal requirement (10 Hz to 100 Hz), a ring signal will be
generated and output to the VOUT pin.
2.9
send Caller-ID signals. The general procedure of sending a Caller-ID
signal is as shown in
number of the ‘01’ pairs of the Seizure Signal, is programmable. It is two
times of the value of the SL[7:0] bits in GREG15. For example, if SL[7:0]
40 Hz < f < 60 Hz, tolerance < ±5%
60 Hz < f < 100 Hz, tolerance < ±2.5%
100 Hz < f < 3400 Hz, tolerance < ±1%
The frequency and amplitude coefficients should be converted to
The ring signal is a special signal generated by the dual tone
The IDT821054 has a built-in FSK generator for all four channels to
The Seizure Signal is a series of '01' pairs. Seizure Length, i.e. the
Figure - 6 General Procedure of Sending Caller-ID Signal
FSK SIGNAL GENERATION
Complete Caller-ID Message Sending?
“9 Appendix: IDT821054 Coe-RAM Mapping”
Send One Word of Caller-ID
Figure -
Send Seizure Signal
Send Mark Signal
Send Flag Signal
Yes
Message
6.
Start
Stop
No
for the
14
= 5 (d), the Seizure Length will be 10 (d).
(Mark Length) is determined by the ML[7:0] bits in GREG16.
sent out. The FSK-RAM consists of 32 words, and each word consists of
two bytes, so it can contain up to 64 bytes of message at one time. If the
total message is longer than 64 bytes, it should be written to the FSK-
RAM at two or more times. Data Length, i.e. the number of the data
bytes that are written to the FSK-RAM for transmission, is set by the
DL[7:0] bits in GREG14.
at the beginning, one Stop Bit at the end and eight bits of Caller-ID
message in the middle. For the IDT821054, the eight bits of Caller-ID
message are from the FSK-RAM, and the Start Bit/Stop Bit will be added
automatically when sending the Caller-ID message.
Length) is determined by the FL[7:0] bits in GREG13.
specification the FSK generator will follow. The IDT821054 supports
both Bellcore 202 and BT standards.
these two standards.
Table - 1 BT/Bellcore Standard of FSK Signal
keep on sending a series of '1's after the completion of sending the
content in the FSK-RAM. If the total Caller-ID message is longer than 64
bytes, the MAS bit should be set to '1' to hold the link after the first 64
bytes of Caller-ID message have been sent. Then, users can update the
FSK-RAM with new data and send the new data without re-sending the
Seizure Signal and Mark Signal. This is important to keep the integrity of
Caller-ID information.
select one of the four channels to send the FSK signal. The FO bit
GREG17 is used to enable/disable the FSK generator. When all
configurations and FSK-RAM updating have been completed, the FS
(FSK Start) bit in GREG17 should be set to ‘1’ to trigger the sending of
FSK signal. The FS bit will be reset to ‘0’ after all data bytes in the FSK-
RAM have been sent out.
shown in
The Mark Signal is a series of '1'. The length of the Mark Signal
The Caller-ID message should be written to the FSK-RAM before it is
One 'Word' of the Caller-ID message consists of 10 bits: one Start Bit
The Flag Signal is a series of '1'. The length of the Flag Signal (Flag
The BS (BT/Bellcore Selection) bit in GREG17 determines which
Transmission rate
The MAS (Mark After Send) bit in GREG17 determines whether to
The FCS[2:0] (FSK Channel Selection) bits in GREG17 are used to
A recommended procedure of programming the FSK generator is
Word format
frequency
frequency
Space (0)
Mark (1)
Figure -
Item
7.
1 start bit which is ‘0’, 8
word bits (with least
significant bit LSB first), 1
stop bit which is ‘1’.
INDUSTRIAL TEMPERATURE RANGE
1200 baud
1300 Hz
2100 Hz
BT
±
±
±
1.5%
1.1%
Table - 1
1%
1 start bit which is ‘0’, 8
word bits (with least
significant bit LSB first), 1
stop bit which is ‘1’.
is the comparison of
1200 Hz
2200 Hz
1200 Hz
Bellcore
±
±
±
1.1%
1.1%
1%