ML9289-XX Datasheet, PDF (19/31 Pages) List of Unclassifed Manufacturers – Vacuum fluorescent display tube controller driver

FEDL9289-01
ML9289-xx
3. “ADRAM data write” command
(Specifies the address of ADRAM and writes symbol data)
ADRAM (Additional Data RAM) has a 2-bit address to store symbol data.
Symbol data specified by ADRAM is directly output without CGROM and CGRAM.
(The ADRAM can store two types of symbol patterns for each digit.)
The terminal to which the contents of ADRAM are output can be used as a cursor.
[Command format]
LSB
MSB
1st byte
(1st)
B0 B1 B2
X0 X1 X2
B3 B4 B5 B6 B7
X3 1 1 0 0
: _{Setup and DCRAM address in the write-in mode of}
DCRAM data are specified.
LSB
MSB (Example: Specify ADRAM address 0H.)
2nd byte
(2nd)
B0
C0
B1
C1
B2
*
B3
*
B4
*
B5
*
B6
*
B7
*
: Specify symbol data.
(Example: Specify ADRAM address 0H.)
To specify symbol data continuously to the next address, specify only symbol data as follows.
Since the address of ADRAM is automatically incremented, address specification is unnecessary.
LSB
MSB
2nd byte
(3rd)
B0
C0
B1
C1
B2
*
B3
*
B4
*
B5
*
B6
*
B7
*
: Specify symbol data.
(It is written into ADRAM address 1H.)
LSB
MSB
2nd byte
(4th)
B0
C0
B1
C1
B2
*
B3
*
B4
*
B5
*
B6
*
B7
*
: Specify symbol data.
(It is written into ADRAM address 2H.)
LSB
MSB
B0 B1 B2 B3 B4 B5 B6 B7
2nd byte
(17th)
C0
C1
*
*
*
*
*
*
: Specify symbol data.
(It is written into ADRAM address FH.)
LSB
MSB
B0 B1 B2 B3 B4 B5 B6 B7
2nd byte _{C0 C1}
(18th)
*
*
*
*
*
*
: Specify symbol data.
(It is rewritten into ADRAM address 0H.)
X0 (LSB) to X3 (MSB) : ADRAM address (4 bits: 16 characters worth)
C0 (LSB) to C1 (MSB) : Symbol data (2 bits: 2 symbols per digit)
* : Don’t care
[Relationship between ADRAM addresses setup and COM positions]
HEX X0 X1 X2 X3
0
0
0
0
0
1
1
0
0
0
2
0
1
0
0
3
1
1
0
0
4
0
0
1
0
5
1
0
1
0
6
0
1
1
0
7
1
1
1
0
COM
positions
COM1
COM2
COM3
COM4
COM5
COM6
COM7
COM8
HEX X0 X1 X2 X3
8
0
0
0
1
9
1
0
0
1
A
0
1
0
1
B
1
1
0
1
C
0
0
1
1
D
1
0
1
1
E
0
1
1
1
F
1
1
1
1
COM
positions
COM9
COM10
COM11
COM12
COM13
COM14
COM15
COM16
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