Samsung S5PC100 User Manual page 1202

S5PC100 USER'S MANUAL (REV1.0) 2D-ACCELERATOR
horizontal resolution must be an even number.
4 COMMAND FIFO
2D-ACCELERATOR has a 32-word command FIFO. All data written to command registers and parameter setting
registers is written to the FIFO first. If the graphics engine is idle (no command is executed), the data is written to
the designated register in one cycle; otherwise, the data is stored in the FIFO and waits to be dispatched after the
current rendering process completes.
It is user's responsibility to make sure that the data written to the FIFO do not exceed its maximum capacity. User
can monitor the number of data entries used in FIFO by reading FIFO_USED bits in FIFO_STAT_REG, or request
graphics engine to give an interrupt signal if the number of entries in FIFO reaches a certain level by setting
FIFO_INTC_REG and E bit in INTEN_REG.
5 RENDERING PIPELINE
The rendering pipeline of 2D-ACCELERATOR is illustrated in Figure 9.5-1. The functionality and related registers
of each stage are introduced in detail in the rest of this chapter.
Figure 9.5-1 2D-ACCELERATOR Rendering Pipeline
9.5-3