Data Transfer Format - Samsung S5PC110 Manual

S5PC110_UM

2.3.2 DATA TRANSFER FORMAT

Every byte placed on the SDA line should be eight bits in length. There is no limit to transmit bytes per transfer.
The first byte following a Start condition should have the address field. If the I
master transmits the address field. Each byte should be followed by an acknowledgement (ACK) bit. The MSB bit
of the serial data and addresses are sent first.
SDA
MSB
1
SCL
S
Write Mode Format with 7-bit Addresses
S Slave Address 7bits R/W A
(Write)
Read Mode Format with 7-bit Addresses
S Slave Address 7 bits R/W A
(Read)
NOTES:
1. S: Start, rS: Repeat Start, P: Stop, A: Acknowledge
2. : From Master to Slave,
Figure 2-3
Acknowledgement
Signal from Receiver
2 7 8
Byte Complete, Interrupt
within Receiver
Figure 2-4
DATA(1Byte)
"0"
Data Transferred
(Data + Acknowledge)
DATA
"1"
Data Transferred
(Data + Acknowledge)
: From Slave to Master
2
I C-Bus Interface Data Format
9 1
ACK
Data Transfer on the I
2 IIC-BUS INTERFACE
2
C-bus is operating in Master mode,
A P
A P
Acknowledgement
Signal from Receiver
2 9
Clock Line Held Low by
receiver and/or transmitter
2
C-Bus
2-4