msm9202 Oki Semiconductor, msm9202 Datasheet - Page 21

• Manufacturer Part Number: msm9202
• Description: 5 7 Dot Character 16-digit Display Controller/driver With Character Ram
• Manufacturer: Oki Semiconductor

¡ Semiconductor
3. ADRAM data write
[Command format]
To specify symbol data continuously to the next address, specify only symbol data as follows.
The address of ADRAM is automatically incremented. Specification of addresses is therefore
unnecessary.
2nd byte
(specifies 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 2 types of symbol patterns for each digit.)
The terminal to which the contents of ADRAM are output can be used as a cursor.
1st byte
(2nd)
(1st)
X0 (LSB) to X3 (MSB) : ADRAM addresses (4 bits: 16 characters)
C0 (LSB) to C1 (MSB): Symbol data (2 bits: 2-symbol data per digit)
2nd byte
2nd byte
2nd byte
2nd byte
(17th)
(18th)
(3rd)
(4th)
LSB
LSB
B0 B1 B2 B3 B4 B5 B6 B7
X0 X1 X2 X3
B0 B1 B2 B3 B4 B5 B6 B7
C0 C1
LSB
LSB
LSB
LSB
B0 B1 B2 B3 B4 B5 B6 B7
C0 C1
B0 B1 B2 B3 B4 B5 B6 B7
C0 C1
B0 B1 B2 B3 B4 B5 B6 B7
C0 C1
B0 B1 B2 B3 B4 B5 B6 B7
C0 C1
*
*
1
*
*
*
*
*
* : Don't care
1
*
*
*
*
*
0
*
*
*
*
*
MSB
MSB
0
*
*
*
*
*
*
*
*
*
: selects ADRAM data write mode and specifies ADRAM
: sets symbol data
address
(Ex: specifies ADRAM address 0H)
(written into ADRAM address 0H)
MSB
MSB
MSB
MSB
*
*
*
*
: sets symbol data
: sets symbol data
: sets symbol data
: sets symbol data
(written into ADRAM address 1H)
(written into ADRAM address 2H)
(written into ADRAM address FH)
(ADRAM address 0H is rewritten.)
FEDL9202-04
MSM9202-01
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