GS9023A 查看數據表（PDF） - Gennum -> Semtech

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GS9023A

GENLINX™ IIGS9023A Embedded Audio CODEC

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PIN DESCRIPTIONS (CONTINUED)

NUMBER

SYMBOL

TYPE

DESCRIPTION

72-74, 77-81

DATA[0:7]

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

83

RE

I

Read enable for Host Interface. Active LOW.

84

WE

I

Write enable for Host Interface. Active LOW.

85

CS

I

Chip select for Host Interface. Active LOW.

86-89

ADDR[3:0]

I

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

91

ANCI

I

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 GS9023A does not

recalculate the EDH checkwords.

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

92

TRS

I

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 1.

93

EDH_INS

I

EDH Insert Selection. Valid in Multiplex Mode only. When set HIGH, the GS9023A

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.

94

MUTE

I

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.

95-97

AM[2:0]

I

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 2.

99

ACLK

I

Input audio signal clock (128 fs). Synchronous to PCLK. In non-AES/EBU audio

modes, the serial audio data is sampled on both edges of ACLK.

NOTE: All unused inputs of the GS9023A should be connected to ground.

GENNUM CORPORATION

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