MTV230MS64 View Datasheet(PDF) - Myson Century Inc
Part Name
Description
View to exact match
MTV230MS64 Datasheet PDF : 31 Pages
| |||
MYSON
TECHNOLOGY
MTV230M
(Rev 1.0)
To program ADDRESS bytes and ATTRIBUTE bytes of the display RAM:
Step 1. Write data into OSDRA to determine the programming row address of the display RAM. And define
whether it is the row address of ADDRESS byte (bit7-bit6 = “0, 0”) or ATTRIBUTE byte (bit7-bit6 =
“0, 1”).
Step 2. Write data into OSDCA to determine the programming column address of the display RAM.
Step 3. Write to OSDDT0 or OSDDT1 the address or attribute of the character to be displayed on the
screen.
Step 4. Post increment operation is executed in the OSDCA (i.e. OSDCA ← OSDCA + 1) to make it point
to the next display RAM location. Overflow of the OSDCA, i.e. overflow from 31, makes itself return
to 0 and makes post increment operation executed in the OSDRA (i.e. OSDRA ← OSDRA + 1).
Overflow of the OSDRA, i.e. overflow from 15, makes itself return to 0.
It is the step 3 which triggers the load of OSDDT0 or OSDDT1 into the current OSDRA, OSDCA address of
the display RAM and the post increment operation. Furthermore, the undefined locations in the display RAM
should be filled with dummy data while post increment operation is executed.
So 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= OSDRA (row address), C= OSDCA (column address), D= OSDDT0 or OSDDT1 (display data)
Format (a) is suitable for updating small amount of data which will be allocated with different row address
and column address. Format (b) is recommended for updating data that has same row address but 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 the format (c)
is applied. Furthermore, the undefined locations in display or user fonts RAM should be filled with dummy
data.
The Configuration of Transmission Formats
Address
b7 b6 b5 b4 b3 b2 b1 b0
ADDRESS
Bytes of
Display Reg.
OSDRA (row address)
OSDCA (column address)
OSDDT0 (data, b8=0)
0
-
D7
0
-
D6
-
-
D5
-
C4
D4
R3
C3
D3
R2
C2
D2
R1
C1
D1
R0
C0
D0
OSDDT1 (data, b8=1) D7 D6 D5 D4 D3 D2 D1 D0
ATTRIBUTE
Bytes of
Display Reg.
OSDRA (row address)
OSDCA (column address)
OSDDT0 (data, b8=0)
0
-
D7
1
-
D6
-
-
D5
-
C4
D4
R3
C3
D3
R2
C2
D2
R1
C1
D1
R0
C0
D0
OSDDT1 (data, b8=1) D7 D6 D5 D4 D3 D2 D1 D0
Row #
(OSDRA) 0 1
0
1
13
14
ADDRESS Bytes of the Display RAM
Column # (OSDCA)
28 29
30
31
R
E
S
Character ADDRESS
ROW
E
of the Display RAM
CTRL REG R
V
E
D
Revision 1.0
- 20 -
2000/11/15
|
|
Share Link: 