82801BA Datasheet, PDF (211/498 Pages) Intel Corporation – Intel 82801BA I/O Controller Hub 2 (ICH2) and Intel 82801BAM I/O Controller Hub 2 Mobile

Functional Description
Table 5-90. Input Slot 1 Bit Definitions
Bit
19
18:12
11
10
9
8
7
6
5
4:2
1:0
Description
Reserved (Set to zero)
Control Register Index (Stuffed with zeros if tagged invalid)
Slot 3 Request: PCM Left Channel*
Slot 4 Request: PCM Right Channel*
Slot 5 Request: Modem Line 1
Slot 6 Request: PCM Center Channel*
Slot 7 Request: PCM Left Surround*
Slot 8 Request: PCM Right Surround*
Slot 9 Request: PCM LFE Channel*
Slot Request 10-12: Not Implemented
Reserved (Stuffed with zeros)
NOTE: *Slot 3 Request and Slot 4 Request bits must be the same value, i.e. set or cleared in tandem. This is
also true for the Slot 7 and Slot 8 Request bits, as well as the Slot 6 and Slot 9 Request bits.
As shown in Table 5-90, slot 1 delivers codec control register read address and multiple sample rate
slot request flags for all output slots of the controller. When a slot request bit is set by the codec, the
controller returns data in that slot in the next output frame. Slot request bits for slots 3 and 4 are
always set or cleared in tandem (i.e., both are set or cleared).
When set, the input slot 1 tag bit only pertains to Status Address Port data from a previous read.
SLOTREQ bits are always valid independent of the slot 1 tag bit.
Input Slot 2: Status Data Port
The status data port receives 16-bit control register read data.
Bit [19:4]: Control Register Read Data
Bit [3:0]: Reserved.
Input Slot 3: PCM Record Left Channel
Input slot 3 is the left channel input of the codec. ICH2 supports 16 bit sample resolution. Samples
transmitted to the ICH2 must be in left/right channel order.
Input Slot 4: PCM Record Right Channel
Input slot 4 is the right channel input of the codec. The ICH2 supports 16 bit sample resolution.
Samples transmitted to the ICH2 must be in left/right channel order.
Input Slot 5: Modem Line
Input slot 5 contains MSB justified modem data. The ICH2 supports 16 bit sample resolution.
82801BA ICH2 and 82801BAM ICH2-M Datasheet
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