TCC720 Datasheet, PDF (83/143 Pages) List of Unclassifed Manufacturers – 32-bit RISC Microprocessor For Digital Media Player

TCC720
32-bit RISC Microprocessor for Digital Media Player
Dec. 16. 2002
UART / IrDA
Preliminary Spec 0.51
9 UART / IrDA
9.1 Functional Description
The TCC720 has 1 simple UART module that can be used in programming the system software
or IrDA interfacing. The block diagram of UART is in the following figure.
LSR
CR
Receiver
FIFO
Receiver
Shift
RZ code
Demod
RXD
DL
IR
IrDACFG2
IrDACFG1
Transmit
FIFO
Interrupt
Generator
Transmit
Shift
RZ code
Modulator
TXD
IREQ
Figure 9.1 UART Block Diagram
This UART is simplified version of UART16550, it provides only a simple interface (TXD, RXD)
between host system and TCC720 system.
In the UART, there are two FIFO blocks for transmission and receiving link. Transmission FIFO
has 4 bytes depth, receiving FIFO has 8 bytes depth.
UART can also be used as IrDA interfacing. There is a signal transformer between IrDA signal
and UART signal.
9-1