S3C44B0X Datasheet, PDF (367/424 Pages) Samsung semiconductor – RISC MICROPROCESSOR

S3C44B0X RISC MICROPROCESSOR
SIO
18 SIO (SYNCHRONOUS I/O)
OVERVIEW
The S3C44B0X SIO (synchronous IO) can interface with various types of external devices that requires serial data
transfer. The SIO module can transmit or receive 8bit serial data at a frequency determined by its corresponding
control register settings. To ensure flexible data transmission rates, you can select an internal or external clock
source.
FEATURES
— 8-bit Data Buffer (SIODAT)
— 12-bit Prescaler (SBRDR)
— 8-bit Interval Counter (ITVCNT)
— Clock Selection Logic
— Serial data I/O pins (SIORXD and SIOTXD)
— External clock input/output pin (SIOCK)
— DMA run mode (auto run/flag run, SIORDY)
SIORDY
3-bit Counter
SIO Control Logic
SIOINT
SIOCK
MCLK
SIORXD
12-bit Prescaler
MUX
8-bit SIO Shift Buffer
Data Bus
Figure 18-1. SIO Interface Block Diagram
SIOTXD
18-1