Revision 1.1
-4-
2001/8/21
MTV038
(Revision 1.1)
MYSON
TECHNOLOGY
There are three transmission formats shown as below:
Format (a) R - C - D -> R - C - D -> R - C - D .....
Format (b) R - C - D -> C - D -> C - D -> C - D .....
Format (c) R - C - D -> D -> D -> D -> D -> D .....
Where R=Row address, C=Column address, D=Display data
3.1.2 I2C bus
I2C bus operation is only selected when SSB pin is left floating. And a valid transmission should be starting
from writing the slave address 7AH(write mode), or 7BH(read mode) to MTV038. The protocol is shown in
Figure 2. And the auto sizing video measurement data (total 12 bytes) are read only registers and the others
are write only registers.
There are three transmission formats for I2C write mode shown as below:
Format (a) S - R - C - D -> R - C - D -> R - C - D .....
Format (b) S - R - C - D -> C - D -> C - D -> C - D .....
Format (c) S - R - C - D -> D -> D -> D -> D -> D .....
Where S=Slave address, R=Row address, C=Column address, D=Display data
And there is one transmission formats for I2C read mode shown as below:
Format (a) S -> D -> D -> D -> D -> D -> D -> D -> D -> D -> D -> D -> D -> D -> D -> dummy D .....
Where S=Slave address, D=Measurement data
In the I2C read mode, 14 bytes of auto sizing video measurement data will be outputed directly from byte 0 to
byte 9 and continues with dummy data until stop condition occurred when R/W bit is set to 1.
Each arbitrary length of data packet consists of 3 portions viz, Row address (R), Column address (C), and
Display data (D). Format (a) is suitable for updating small amount of data which will be allocated with a differ-
ent row address and column address. Format (b) is recommended for updating data that has the same row
address but a different column address. Massive data updating or full screen data change should use format
(c) to increase transmission efficiency. The row and column address will be incremented automatically when
FIGURE 1. Data Transmission Protocol (SPI)
SCK
SSB
SDA
LSB
MSB
First byte
Last byte
FIGURE 2. Data Transmission Protocol (I2C)
SCK
SDA
START
STOP
ACK
ACK
First byte
Last byte
Second byte
B7
B6
B0
B7
B0