ST18-AU1 STMICROELECTRONICS [STMicroelectronics], ST18-AU1 Datasheet - Page 16
ST18-AU1
Manufacturer Part Number
ST18-AU1
Description
SIX-CHANNEL DOLBY AC3/MPEG2 AUDIO DECODER
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
1.ST18-AU1.pdf
(87 pages)
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ST18-AU1
4
The host interface is a fast I
connection to an external host processor. It receives operating commands, and returns host
requested bitstream information and internal status.
4.1 Host interface registers
HSER: Host serial shift register
This 16-bit shift register is used for serial data input and output. Data is shifted MSB first. It is
not visible from the D950.
HDR: Host data register
This register is used for transfers between the HSER register and the D950.
Figure 4.1
16/87
HOST INTERFACE
HCL
HDA
HSER
HDR
YD
Host interface data exchange, receive mode
msb
(msb)
msb 6
byte 0
(16-bit words)
16-bit
5
byte 0
4
16-bit
2
byte 1
C serial bus interface operated in slave mode. It provides
3
lsb
(lsb)
2
1 lsb
ack
HDA
msb 6
YD
HSER
HDR
5
byte 1 .....
msb
8-bit
(8-bit words)
(msb)
4
byte 0
3
8-bit
lsb
2
8-bit
1 lsb
(lsb)
‘0’
HDA
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