ks0073 ETC-unknow, ks0073 Datasheet - Page 37

• Manufacturer Part Number: ks0073
• Description: 34com / 60seg Driver & Controller For Dot Matrix Lcd
• Manufacturer: ETC-unknow

KS0073
14) Read Busy Flag & Address
This instruction shows whether KS0073 is in internal operation or not. If the resultant BF is High,
the internal operation is in progress and should wait until BF to be Low, which by then the next instruction can be
performed. In this instruction the value of address counter can also be read.
15) Write data to RAM
Write binary 8-bit data to DDRAM/CGRAM/SEGRAM.
The selection of RAM from DDRAM, CGRAM, or SEGRAM, is set by the previous address set instruction: DDRAM
address set, CGRAM address set, SEGRAM address set.
RAM set instruction can also determine the AC direction to RAM.
After write operation, the address is automatically increased/decreased by 1, according to the entry mode.
16) Read data from RAM
Read binary 8-bit data from DDRAM/CGRAM/SEGRAM.
The selection of RAM is set by the previous address set instruction. If address set instruction of RAM is not
performed before this instruction, the data that is read first is invalid, as the direction of AC is not determined.
If RAM data is read several times without RAM address set instructions before read operation, the correct
RAM data can be obtained from the second, but the first data would be incorrect, as there is no time margin
to transfer RAM data. In DDRAM read operation, cursor shift instruction plays the same role as DDRAM
address set instruction: it also transfers RAM data to output data register.
After read operation address counter is automatically increased/decreased by 1 according to the entry
mode. After CGRAM/SEGRAM read operation, display shift may not be executed correctly.
* In the case of RAM write operation, AC is increased/decreased by 1 as in read operation after this. In this
time, AC indicates the next address position, but the previous data can only be read by read instruction.
RS
RS
RS
0
1
1
R/W
R/W
R/W
1
0
1
DB7
DB7
DB7
BF
D7
D7
DB6
DB6
DB6
34COM / 60SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD
AC6
D6
D6
DB5
DB5
DB5
AC5
D5
D5
DB4
DB4
DB4
AC4
D4
D4
DB3
DB3
DB3
AC3
D3
D3
DB2
DB2
DB2
AC2
D2
D2
DB1
DB1
DB1
AC1
D1
D1
DB0
DB0
DB0
AC0
D0
D0