Samsung S5PC110, Руководство пользователя

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S5PC110_UM 3 2BMIPI DSIM
3-3
3.1.2.2 Internal Primary FIFOs
Table 3-1
describes configurable-sized primary FIFOs.
Table 3-1 Internal Primary FIFO List
Port FIFO Type Size Description
Packet Header FIFO 3byte X 64 depth Specifies the packet header FIFO for main
display. Main display
Payload FIFO 4byte X 1024
depth Specifies the payload FIFO for main display
image.
Packet Header FIFO 3byte X 4 depth Specifies the packet header FIFO for I80
INTERFACE sub display. Sub display for
I80 INTERFACE
image data
Payload FIFO 4byte X 512 depth Specifies the payload FIFO for I80
INTERFACE sub display image.
Packet Header FIFO 3byte X 16 depth Specifies the packet header FIFO for I80
INTERFACE command packet. Command for I80
INTERFACE
command
Payload FIFO 4byte X 16 depth Specifies the payload FIFO for I80
INTERFACE command long packet payload.
Packet Header FIFO 3byte X 16 depth Specifies the packet header FIFO for general
packet. SFR for general
packets
Payload FIFO 4byte X 512 depth Specifies the payload FIFO for general long
packet.
RX FIFO Packet header and
Payload FIFO 4byte X 64 depth Specifies Rx FIFO for LPDR. This FIFO is
common for packet header and payload.
3.1.2.3 Packet Header Arbitration
There are four-packet headers FIFOs for Tx, namely, main display, sub display, I80 INTERFACE command, and
SFR FIFO. The main and sub display FIFO packet headers contain the image data, while the I80 INTERFACE
command FIFO packet header contains the command packets. On the other hand, the SFR FIFO packet header
contains command packets, sub display image data (in Video mode), and so on.
The packet header arbiter has a “Fixed priority” algorithm. Priority order is fixed as main display, sub display, I80
INTERFACE command, and SFR FIFO packet header.
In the Video mode, sub display and I80 INTERFACE command FIFO are not used. The SFR FIFO packet header
checks if the main display FIFO is empty (no request) in not-active image region and then sends its request.