ALC202 Просмотр технического описания (PDF) - Realtek Semiconductor
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ALC202 Datasheet PDF : 42 Pages
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ALC202/ALC202A
REALTEK/AVANCE LOGIC, INC.
TWO CHANNEL AC’97 AUDIO CODEC
ALC202 / ALC202A
1. Features........................................................................ 2
2. General Description .................................................... 2
3. Block Diagram............................................................. 3
4. Pin Assignments .......................................................... 5
5. Pin Description ............................................................ 6
5.1 Digital I/O Pins ...................................................... 6
5.2 Analog I/O Pins...................................................... 7
5.3 Filter/Reference...................................................... 7
5.4 Power/Ground ........................................................ 8
5.5 Others..................................................................... 8
6. Registers....................................................................... 9
6.1 Mixer Registers ...................................................... 9
6.1.1 MX00 Reset.................................................. 10
6.1.2 MX02 Master Volume.................................. 10
6.1.3 MX04 Headphone/True Line Output Volume .. 10
6.1.4 MX06 MONO_OUT Volume ...................... 11
6.1.5 MX0A PC BEEP Volume ............................ 11
6.1.6 MX0C PHONE Volume............................... 11
6.1.7 MX0E MIC Volume..................................... 12
6.1.8 MX10 LINE_IN Volume ............................. 12
6.1.9 MX12 CD Volume ....................................... 12
6.1.10 MX14 VIDEO Volume .............................. 13
6.1.11 MX16 AUX Volume .................................. 13
6.1.12 MX18 PCM_OUT Volume ........................ 13
6.1.13 MX1A Record Select ................................. 14
6.1.14 MX1C Record Gain.................................... 14
6.1.15 MX20 General Purpose Register................ 15
6.1.16 MX22 3D Control ...................................... 15
6.1.17 MX26 Powerdown Control/Status ............. 16
6.1.18 MX28 Extended Audio ID ......................... 17
6.1.19 MX2A Extended Audio Status and Control.. 18
6.1.20 MX2C PCM DAC Rate.............................. 18
6.1.21 MX32 PCM ADC Rate .............................. 19
6.1.22 MX3A S/PDIF Channel Status and Control.. 19
6.2 Vendor Defined Registers .................................... 20
6.2.1 MX6A Miscellaneous Control...................... 20
6.3 Extension Registers.............................................. 21
6.3.1 MX76 GPIO Setup ....................................... 21
6.3.2 MX78 GPIO Status...................................... 22
6.3.3 MX7A Various Controls .............................. 23
6.3.4 MX7C VENDOR ID1 ................................. 24
6.3.5 MX7E VENDOR ID2 ................................. 24
7. Electrical Characteristics ......................................... 25
7.1 DC Characteristics ............................................... 25
7.1.1 Absolute Maximum Ratings......................... 25
7.1.2 Threshold Hold Voltage ............................... 25
7.1.3 Digital Filter Characteristics......................... 26
7.1.4 S/PDIF output Characteristics ...................... 26
7.2 AC Timing Characteristics................................... 26
7.2.1 Cold Reset .................................................... 26
7.2.2 Warm Reset .................................................. 26
7.2.3 AC-Link Clocks ........................................... 27
7.2.4 Data Output and Input Timing ..................... 27
7.2.5 Signal Rise and Fall Timing ......................... 28
7.2.6 AC-Link Low Power Mode Timing ............. 28
7.2.7 ATE Test Mode ............................................ 29
7.2.8 AC-Link IO Pin Capacitance and Loading .. 29
7.2.9 SPDIF Output............................................... 29
7.2.10 BIT-CLK and SDATA-IN State................. 29
8. Analog Performance Characteristics ...................... 30
9. Design Suggestions.................................................... 32
9.1 Clocking............................................................... 32
9.2 AC-Link ............................................................... 33
9.3 Reset..................................................................... 34
9.4 CD Input .............................................................. 34
9.5 Odd Addressed Register Access .......................... 34
9.6 Power-down Mode............................................... 34
9.7 Test Mode ............................................................ 34
9.7.1 ATE In Circuit Test Mode............................ 34
9.7.2 Vendor Specific Test Mode.......................... 34
9.8 Jack-Detect Function ........................................... 35
9.9 DC Voltage Volume Control ............................... 36
9.10 POWER OFF CD Function ............................... 37
10. Application Circuit ................................................. 38
11. Mechanical Dimensions .......................................... 41
12. Revision History...................................................... 42
2002/07/30
1
Rev.1.28
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