Pre-Production
WM8850
STEREO ANALOGUE LINE RECORD
Stereo analogue line input is supported using the VIN1LP, VIN1LN, VIN1RP and VIN1RN pins; these
are available for high-quality stereo digitisation through the ADC1 node.
The WM8850 nodes associated with this function are shown in Figure 5.
Figure 5 Stereo Analogue Line Record Path
This section provides a summary of the Port-E, PGA1 and ADC1 nodes, and describes the vendor-
specific verb functions associated with each.
PORT-E (NID = 0CH)
Table 6 gives a summary of the Port-E node:
NODE SUMMARY INFORMATION
NID
0Ch
Widget Type
Pin Complex
Supported Get Verbs
Supported Set Verbs
Unsolicited Responses
Vendor-Specific Verbs
F00h, F07h, F08h, F09h, F0Ch, F1Ch, F8Eh, FB0h
707h, 708h, 70Ch, 71Ch, 71Dh, 71Eh, 71Fh, 78Eh, 7B0h
Presence Detect Status Change
F8Eh, 78Eh : Unsolicited Response Priority Control Verb
FB0h, 7B0h : Auto-Mute Control Verb
Table 6 Port-E Node Summary Information
Port-E supports two different input configurations, controlled by the EAPD/BTL Verb.
SET VERB
BIT
BITFIELD
NAME
DEFAULT
DESCRIPTION
70Ch
0
BTL
1h
Controls the configuration of the input pins on
Port-E:
0 = Single-ended mode
1 = BTL (balanced) mode
In single-ended input mode, VIN1LP and VIN1RP are used as the Port-E input pins VIN1LN and
VIN1RN must be left floating in this mode. Note that the full-scale input signal level is reduced in
single-ended mode, as shown in the “Electrical Characteristics” section.
In differential input mode, VIN1LP, VIN1LN, VIN1RP and VIN1RN are used as the Port-E input pins.
See Figure 6 for examples of the external connections required in each of the supported input
configurations.
PP, April 2011, Rev 3.2
39
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
