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GS9023B

GENLINX® II GS9023B Embedded Audio CODEC

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Table 1-1: Pin Descriptions (Continued)

Number

68

70

72-74, 77-81

83

84

85

86-89

91

92

93

94

95-97

Symbol

LOCK

BUFERR

DATA[0:7]

RE

WE

CS

ADDR[3:0]

ANCI

TRS

EDH_INS

MUTE

AM[2:0]

Type

O

O

I/O

I

I

I

I

I

I

I

I

I

Description

Lock indicator. In Multiplex Mode, when HIGH, the video standard has been

identified, the start of a new video frame has been detected and the device is

multiplexing audio.

NOTE: LOCK will not be set HIGH unless at least one of the audio channel enable

bits is HIGH. See “CHACT” description in Table 4-1.

In Demultiplex Mode, when HIGH, the video standard has been identified, the

‘lock’ process selected by “ACTSEL” has been validated and the device is

demultiplexing audio. See “ACTSEL” description in Table 4-2.

NOTE: LOCK remains active regardless of the number of audio samples in the

video stream after ‘lock’ is achieved.

Buffer error. Indicates when an internal buffer overflow/underflow error has

occurred. Valid only when the device is configured to operate in Demultiplex

Mode.

NOTE: If an internal buffer overflow/underflow condition occurs, the GS9023B

does not mute the audio output.

Host Interface data bus. DATA[7] is the MSB and DATA[0] is the LSB.

Read enable for Host Interface. Active LOW.

Write enable for Host Interface. Active LOW.

Chip select for Host Interface. Active LOW.

Host Interface address bus. ADDR[3] is the MSB and ADDR[0] is the LSB.

ANCI Selection. Valid in Demultiplex Mode only. When set HIGH, each ancillary

data packet with a DID corresponding to either the audio packet DID, the

extended audio packet DID or the arbitrary packet DID is removed from the

video signal. The data contained in the packets are output at the corresponding

pins. The various DIDs are user programmable in the internal registers and are

accessible via the Host Interface.

NOTE: When ancillary data packets are deleted, the GS9023B does not recalculate

the EDH checkwords.

When set LOW, all ancillary data packets remain in the video signal.

TRS Selection. Used in conjunction with the VM[2:0] pins to select video standard

format. In Multiplex Mode, when the TRS pin is HIGH, TRS is added to a

composite video signal. In Demultiplex Mode, when HIGH, TRS is removed from a

composite video signal. See Table 3-1.

EDH Insert Selection. Valid in Multiplex Mode only. When set HIGH, the GS9023B

performs EDH functions according to SMPTE RP165. When set LOW, EDH is not

inserted. This setting is logical OR with the related EDHON setting in host

interface register address 1h.

NOTE: Active picture and full field data words are updated from recalculated

values but error flag information is replaced with the values programmed in the

internal registers via the Host Interface.

Audio mute. In Multiplex Mode, when set HIGH, the embedded audio packets

are forced to ‘0’. In Demultiplex Mode, when set HIGH, the output data is forced

to “0”. This setting is logical OR with the related MUTE setting in host interface

address 4h.

Audio mode format. In Multiplex Mode, AM[2:0] indicates the input audio data

format. In Demultiplex Mode, AM[2:0] indicates the output audio data format.

AM[2] is the MSB and AM[0] is the LSB. See Table 3-2.

GS9023B GENLINX® II GS9023B Embedded Audio

CODEC

Data Sheet

37954 - 2

December 2009

8 of 56

Proprietary & Confidential

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