STAC9758 Datasheet, PDF (87/119 Pages) Integrated Device Technology – HIGH-PERFORMANCE 6-CHANNEL AC’97 2.3 CODEC WITH UNIVERSAL JACKS

STAC9758/9759
HIGH-PERFORMANCE 6-CHANNEL AC’97 2.3 CODEC WITH UNIVERSAL JACKS™
PC AUDIO
Bit(s) Reset Value R/W Name
Description
15:13
0
RO RESERVED RESERVED-NOT DEFINED
CODEC Compatibility Class (RO)
This is a CODEC vendor specific field to define software compatibility for
the CODEC. Software read this field together with CODEC vendor ID (reg
7C-7Eh) to determine vendor specific programming interface compatibility.
12:8
*
RO CL4:CL0 _{Software can rely on vendor specific register behavior to be compatible}
among vendor CODECs of the same class.
00h - Field not implemented.
01h-1Fh - Vendor specific compatibility class code
Revision ID: (RO)
This register specifies a device specific revision identifier. The value is
7:0
**
RO RV7:RV0 chosen by the vendor. Zero is an acceptable value. This field should be
viewed as a vendor defined extension to the CODEC ID. This number
changes with new CODEC stepping of the same CODEC ID.
8.6.3.
SPDIF_In Status 2 Register (62h, Page 00h)
Register 24h must be set to Page 00h to access this register. Second of two registers that echo the
status bits from the SDATA_IN header.
Default: 0000h
D15
D14
D13
D12
D11
D10
D9
D8
SP_VAL RESERVED
CA1
CA0
FS3
FS2
FS1
FS0
D7
D6
D5
D4
D3
D2
D1
D0
CN3
CN2
CN1
CN0
SN3
SN2
SN1
SN0
Bit(s) Reset Value R/W Name
Description
0 = SPDIF Valid
1 = SPDIF Invalid
Validity: This bit affects the "Validity" flag, bit[28] transmitted in each
SPDIF subframe, and enables the SPDIF transmitter to maintain
15
0
RO SP_VAL connection during error or mute conditions. Subframe bit[28] = 0 indicates
that data is valid for conversion at the receiver, 1 indicates invalid data
(not suitable for conversion at the receiver).
If either SPDIF subframe bit[28] validity flag = 1, then this field is set to
invalid, equal 1.
14
0
RO RESERVED Bit not used, should read back 0
Clock accuracy
00 = Level II
13:12
00
RO CA<1:0> 01 = Level I
10 = Level III
11 = Reserved
Sample Rate
0000 = 44.1 KHz
11:8
0000
RO
FS<3:0>
0100 = 48 KHz
1100 = 32 KHz
All other combinations are reserved and shall not be used until further
defined (IEC spec).
IDT™
87
HIGH-PERFORMANCE 6-CHANNEL AC’97 2.3 CODEC WITH UNIVERSAL JACKS™
STAC9758/9759
V 1.2 1206