TC35273 データシートの表示（PDF） - Toshiba
部品番号
コンポーネント説明
メーカー
TC35273 Datasheet PDF : 23 Pages
| |||
Preliminary
MPEG-4 Audiovisual Codec LSI
TC35273
3.6 Network Bit Stream Interface
The multiplexed audiovisual bitstream data are transferred to/from a baseband LSI via a network
bit stream interface. This is full-dupulex interface and has two operation modes; a bit serial mode
and a frame mode.
(1) Bit Serial Mode
Serial data are transferred when an enable signal indicates the data validity. In this mode, frame
and synchronization informations are contained in the transferred data.
TC35273 receives the transferred data via the NWDI pin at the negedge of the network clock
“NWCLK” if the input enable signal “NWIEN” shows the data validity. (When NWIEN is low, the data
are valid.) TC35273 also sends the data via the NWDO pin at the posedge of NWCLK if the output
enable signal “NWOEN” is high.
NWCLK
/NWOEN
NWDO
D0 D1 D2 D3 D4 D5
D6 D7 D8 D9
/NWIEN
NWDI
D0
D1 D2 D3 D4 D5
D6 D7 D8
Fig. 16 Network bit stream timing diagram (bit serial mode).
(2) Frame Mode
The data are transferred in accordance with both a frame signal “NWINT” and a word
synchronization signal. “NWIFS” and “NWOFS” are used for the word synchronization in the data
receive and the data send, respectively. After NWIFS or NWOFS becomes high, 16-bit data are
transferred. When the data transfer is finished in the frame, NWIFS or NWOFS does not becomes
high. In this case, the output data are fixed to low, and the input data are ignored.
TOSHIBA Confidential
21/23
Version 0.90
2000-4-27
Share Link: 