S3C2416X RISC MICROPROCESSOR
IIC-BUS INTERFACE
17-1
17
IIC-BUS INTERFACE
1 OVERVIEW
The S3C2416 RISC microprocessor can support one channels of multi-master IIC-bus serial interface. A
dedicated serial data line (SDA) and a serial clock line (SCL) carry information between bus masters and
peripheral devices which are connected to the IIC-bus. The SDA and SCL lines are bi-directional.
In multi-master IIC-bus mode, multiple S3C2416 RISC microprocessors can receive or transmit serial data to or
from slave devices. The master S3C2416 can initiate and terminate a data transfer over the IIC-bus. The IIC-bus
in the S3C2416 uses Standard bus arbitration procedure.
To control multi-master IIC-bus operations, values must be written to the following registers:
•
Multi-master IIC-bus control register, IICCON
•
Multi-master IIC-bus control/status register, IICSTAT
•
Multi-master IIC-bus Tx/Rx data shift register, IICDS
•
Multi-master IIC-bus address register, IICADD
When the IIC-bus is free, the SDA and SCL lines should be both at High level. A High-to-Low transition of SDA
can initiate a Start condition. A Low-to-High transition of SDA can initiate a Stop condition while SCL remains
steady at High Level.
The Start and Stop conditions can always be generated by the master devices. A 7-bit address value in the first
data byte, which is put onto the bus after the Start condition has been initiated, can determine the slave device
which the bus master device has selected. The 8th bit determines the direction of the transfer (read or write).
Every data byte put onto the SDA line should be eight bits in total. The bytes can be unlimitedly sent or received
during the bus transfer operation. Data is always sent from most-significant bit (MSB) first, and every byte should
be immediately followed by acknowledge (ACK) bit.
Summary of Contents for S3C2416
Page 122: ...BUS MATRIX EBI S3C2416X RISC MICROPROCESSOR 3 4 NOTES ...
Page 204: ...DMA CONTROLLER S3C2416X RISC MICROPROCESSOR 8 18 NOTES ...
Page 284: ...WATCHDOG TIMER S3C2416X RISC MICROPROCESSOR 11 6 NOTES ...
Page 320: ...REAL TIME CLOCK S3C2416X RISC MICROPROCESSOR 13 16 NOTES ...
Page 344: ...UART S3C2416X RISC MICROPROCESSOR 14 24 NOTES ...
Page 380: ...USB2 0 DEVICE S3C2416X RISC MICROPROCESSOR 16 34 NOTES ...
Page 432: ...2D S3C2416X RISC MICROPROCESSOR 18 38 NOTES ...
Page 446: ...HS_SPI CONTROLLER S3C2416X RISC MICROPROCESSOR 19 14 NOTES ...
Page 604: ...S3C2416X RISC MICROPROCESSOR S3C2416X RISC MICROPROCESSOR 23 22 NOTES ...
Page 638: ...PCM AUDIO INTERFACE S3C2416X RISC MICROPROCESSOR 25 18 NOTES ...
Page 670: ...ELECTRICAL DATA S3C2416X RISC MICROPROCESSOR 26 32 NOTES ...