2.1.2 PCM Bus ....................................................................................................................................................................................10
2.2.1 Signal Processing.......................................................................................................................................................................11
2.2.2 Gain Adjustment.........................................................................................................................................................................11
2.2.5 Frequency Response Correction................................................................................................................................................12
2.3 SLIC Control ............................................................................................................................................................................................12
2.3.1 SI1 and SI2.................................................................................................................................................................................12
2.3.2 SB1, SB2 and SB3 .....................................................................................................................................................................12
2.3.3 SO1 and SO2 .............................................................................................................................................................................12
2.4 Hardware Ring Trip .................................................................................................................................................................................12
2.5 Interrupt and Interrupt Enable..................................................................................................................................................................12
2.8 Dual Tone and Ring Generation..............................................................................................................................................................13
2.9 FSK SIGNAL GENERATION...................................................................................................................................................................14
2.11 Channel Power Down/Standby Mode......................................................................................................................................................16
2.12 Power Down/Suspend Mode ...................................................................................................................................................................16
Operating The IDT821054 ................................................................................................................................................................................17
3.1.1 Command Type and Format ......................................................................................................................................................17
3.1.2 Addressing the Local Registers..................................................................................................................................................17
3.1.3 Addressing the Global Registers................................................................................................................................................17
3.1.4 Addressing the Coe-RAM...........................................................................................................................................................17
3.1.6.1 Example of Programming Local Registers .................................................................................................................18
3.1.6.2 Example of Programming Global Registers................................................................................................................18
3.1.6.3 Example of Programming the Coefficient-RAM..........................................................................................................18
3.1.6.4 Example of Programming the FSK-RAM....................................................................................................................19
3.3 Default State After Reset.........................................................................................................................................................................21
3.4.2 Global Registers List ..................................................................................................................................................................24
3.4.3 Local Registers List ....................................................................................................................................................................31
Absolute Maximum Ratings ............................................................................................................................................................................35
Recommended DC Operating Conditions .....................................................................................................................................................35
6.1 Digital Interface........................................................................................................................................................................................35
6.2 Power Dissipation....................................................................................................................................................................................35
6.3 Analog Interface ......................................................................................................................................................................................36
7.1 Absolute Gain ..........................................................................................................................................................................................37
7.2 Gain Tracking ..........................................................................................................................................................................................37
7.3 Frequency Response ..............................................................................................................................................................................37
3
3
4
5
6
7
IDT821054 QUAD PROGRAMMABLE PCM CODEC WITH MPI INTERFACE
INDUSTRIAL TEMPERATURE RANGE
7.4
7.5
7.6
7.7
7.8
8
Group Delay ............................................................................................................................................................................................38
10 Ordering Information .......................................................................................................................................................................................44
4
IDT821054 QUAD PROGRAMMABLE PCM CODEC WITH MPI INTERFACE
INDUSTRIAL TEMPERATURE RANGE
LIST OF FIGURES
Figure - 1
Figure - 2
Figure - 3
Figure - 4
Figure - 5
Figure - 6
Figure - 7
Figure - 8
Figure - 9
Figure - 10
Figure - 11
Figure - 12
Figure - 13
An Example of the MPI Interface Write Operation .............................................................................................................................. 9
An Example of the MPI Interface Read Operation (ID = 81H)............................................................................................................. 9
Signal Flow for Each Channel ........................................................................................................................................................... 11
General Procedure of Sending Caller-ID Signal................................................................................................................................ 14
A Recommended Procedure of Programming the FSK Generator ................................................................................................... 15
Transmit and Receive Timing............................................................................................................................................................ 42
LED 是light emitting diode (发光二极管)的缩写,是一种由半导体技术制成的电光源。LED的核心部分是由P型半导体和N型半导体组成的晶片,在P型半导体和N型半导体之间有一个过渡层,称为P2N结。在正向导通时,半导体中的多数载流子和少数载流子复合,释放出的能量以光子或部分以光子的形式发射出来,大量的光子形成光子流,即发光。P2N结加反向电压时,少数载流子难以注入,故不发...[详细]
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