82801CA Datasheet, PDF (213/521 Pages) Intel Corporation – I/O Controller Hub 3-S (ICH3-S)

Functional Description
Table 5-97. Features Supported by Intel^® ICH3 (Continued)
Feature
PCI Modem
Function
AC-Link
Multiple Codec
Description
• Read/write access to modem codec registers 3Ch–58h and vendor registers 5Ah–
7Eh
• 16-bit mono modem line1 output and input, up to 48 kHz (slot 5)
• Low latency GPIO[15:0] via hardwired update between slot 12 and PCI I/O register
• Programmable PCI interrupt on modem GPIO input changes via slot 12 GPIO_INT
• SCI event generation on primary or secondary SDIN wake-up signal
• Audio Codec ’97, Revision 2.2 compliant AC-link interface
• Variable sample rate output support via AC ’97 SLOTREQ protocol (slots
3,4,5,6,7,8,9)
• Variable sample rate input support via monitoring of slot valid tag bits (slots 3,4,5,6)
• 3.3 V digital operation meets Audio Codec ’97, Revision 2.2 DC switching levels
• AC-Link I/O driver capability meets Audio Codec ’97, Revision 2.2 dual codec
specifications
• Codec register status reads must be returned with data in the next AC-link frame, per
Audio Codec ’97, Revision 2.2.
• Dual codec addressing: All AC ’97 codec register accesses are addressable to codec
ID 00 (primary) or codec ID 01 (secondary)
• Dual codec receive capability via primary and secondary SDIN pins
(primary, secondary SDIN frames are internally validated, synch’d, and OR’d)
Note: Throughout this document, references to D31:F5 indicate that the audio function exists in PCI
Device 31, Function 5. References to D31:F6 indicate that the modem function exists in PCI
Device 31, Function 6.
Figure 5-19. Intel^® ICH3 Based Audio Codec ’97, Revision 2.2
Audio In (Record)
PC
Audio Out (Playback)
Modem
Mic.
Intel^® 82801CA ICH3-S Datasheet
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