msm9201-01 Oki Semiconductor, msm9201-01 Datasheet - Page 24

• Manufacturer Part Number: msm9201-01
• Description: Fluorescent Display Tube Controller Driver
• 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 addresses of ADRAM are automatically incremented. Specification of ADRAM addresses
is therefore unnecessary.
Setting of symbol data for up to 24 digits is now complete.
To further specify symbol data continuously from DCRAM address 00H, dummy symbol data
must be specified for ADRAM addresses 18H to 1FH (so that the ADRAM address will be
incremented automatically and will be reset to 00H).
2nd byte
1st byte
(2nd)
2nd byte
2nd byte
2nd byte
2nd byte
2nd byte
2nd byte
(1st)
(17th)
(18th)
(specifies address of ADRAM and writes symbol data)
ADRAM (Additional Data RAM) has 4-bit addresses to store symbol data.
Symbol data specified in ADRAM is directly output without CGROM and CGRAM.
(The DRAM can store 4 types of symbol patterns for each digit.)
The terminal to which the contents of ADRAM are output can be used as a cursor.
(65th)
(66th)
(3rd)
(4th)
X0 (LSB) to X4 (MSB): ADRAM addresses (5 bits: 24 characters)
C0 (LSB) to C3 (MSB): Symbol data (4 bits: 4-symbol data per digit)
LSB
LSB
B0 B1 B2 B3 B4 B5 B6 B7
X0 X1 X2 X3 X4
B0 B1 B2 B3 B4 B5 B6 B7
C0 C1 C2 C3
LSB
LSB
LSB
LSB
LSB
LSB
B0 B1 B2 B3 B4 B5 B6 B7
C0 C1 C2 C3
B0 B1 B2 B3 B4 B5 B6 B7
C0 C1 C2 C3
B0 B1 B2 B3 B4 B5 B6 B7
C0 C1 C2 C3
B0 B1 B2 B3 B4 B5 B6 B7
C0 C1 C2 C3
B0 B1 B2 B3 B4 B5 B6 B7
C0 C1 C2 C3
B0 B1 B2 B3 B4 B5 B6 B7
C0 C1 C2 C3 C4 C5 C6 C7
*
*
*
*
*
*
1
*
*
*
*
*
*
1
*
*
*
*
*
*
MSB
MSB
0
*
MSB
MSB
MSB
MSB
MSB
MSB
*
*
*
*
*
: selects ADRAM data write mode and specifies ADRAM
: specifies symbol data.
: specifies symbol data.
: specifies symbol data.
: specifies symbol data.
: specifies dummy symbol data.
: specifies dummy symbol data.
: specifies symbol data.
address.
(Ex: specifies ADRAM address 00H)
(written into ADRAM address 00H)
(written into ADRAM address 01H)
(written into ADRAM address 02H)
(written into ADRAM address 17FH)
(not written into ADRAM address)
(not written into ADRAM address)
(rewritten into ADRAM address 00H.)
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