MB87P2020 Datasheet, PDF (43/356 Pages) Fujitsu Component Limited. – Colour LCD/CRT/TV Controller

MB91F361
Interrupt
GDC I/O−Ring
Address CSX/RDX/WRX[3:0]
Data In / Out
RDY
User Logic Bus
DMA
ULB
Interrupt Controller
Register File
Input Sync
Address Decoder
Command
Controller
I/O Controller
DMA Controller
IFIFO
OFIFO
CTRL
Device Control
to CTRL to DPA
Figure 1-1: Block diagram for top level of ULB
IFIFO read OFIFO write CTRL data
interface
DPA data
interface
Name
Command Controller (CC)
I/O controller (IOC)
DMA Controller (DMAC)
Register File (RF)
Table 1-1: Top level modules of ULB
Main functions
• Command decoding
• Management of command execution
• Condition decoding for control command execution
• Read/write control for data part of user logic bus
• Access control and status signal generation for data FIFOs and
registers for MCU and display controller site
• Clock domain synchronization for read data bus (display con-
troller->MCU)
• Bus multiplexing for display controller read data busses
• DMA flow control for MCU site of input and output FIFO
• Storing of user definable parameters for ULB
Functional description
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