S6A0032 Datasheet, PDF (13/39 Pages) Samsung semiconductor – 16 COM / 80 SEG DRIVER & CONTROLLER FOR STN LCD

16 COM / 80 SEG DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.5
S6A0032
DL
MI
CSB
RS
RW_WR
E_RD
DB7 to DB0
Upper
4-bit
Lower
4-bit
BF
A3 -
A0
Instruction W rite Busy Flag &
Address Read
Dummy
Data Read
D7 -
D4
D3 -
D0
Valid
Data Read
D7 -
D4
D3 -
D0
Data W rite
Figure 5. Timing Diagram of 4-bit Parallel Bus Mode Data Transfer (6800-series MPU Mode)
DL
MI
CSB
RS
RW_WR
E_RD
DB7 to DB0
Upper
4-bit
Lower
4-bit
Instruction W rite
BF
A3 -
A0
Busy Flag &
Address Read
Dummy
Data Read
D7 -
D4
D3 -
D0
Valid
Data Read
D7 -
D4
D3 -
D0
Data W rite
Figure 6. Timing Diagram of 4-bit Parallel Bus Mode Data Transfer (8080-series MPU Mode)
Busy Flag
When DB7 is "High" in read status operation, it indicates that the internal operation is in busy status and can accept
only read status instruction. If the cycle time is correct, the microprocessor needs not to check this flag before each
instruction, except display clear instruction.
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