S6B0724A01-B0CZ 查看數據表（PDF） - Samsung

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S6B0724A01-B0CZ

132 SEG / 65COM DRIVER & CONTROLLER FOR STN LCD

Samsung 

S6B0724 PRELIMINARY SPEC. VER. 1.1

132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD

CS1B

CS2

SID

SCLK

RS

DB7

DB6 DB5

DB4

DB3

DB2 DB1

DB0

DB7

DB6

Figure 5. Serial Interface Timing

Busy Flag

The Busy Flag indicates whether the S6B0724 is operating or not. When DB7 is "H" in read status operation, this

device is in busy status and will accept only read status instruction. If the cycle time is correct, the microprocessor

needs not to check this flag before each instruction, which improves the MPU performance.

Data Transfer

The S6B 0724 uses bus holder and internal data bus for data transfer with the MPU. When writing data from the MPU

to on-chip RAM, data is automatically transferred from the bus holder to the RAM as shown in figure 4. And when

reading data from on-chip RAM to the MPU, the data for the initial read cycle is stored in the bus holder (dummy

read) and the MPU reads this stored data from bus holder for the next data read cycle as shown in figure 5. This

means that a dummy read cycle must be inserted between each pair of address sets when a sequence of address

sets is executed. Therefore, the data of the specified address cannot be output with the read display data instruction

right after the address sets, but can be output at the second read of data.

MPU signals

RS

/ W RB

DB0 to DB7

N

Internal signals

/ W RB

BUS HOLDER

N

COLUMN ADDRESS

D(N)

D(N+1)

D(N+2)

D(N+3)

D(N)

N

D(N+1)

N+1

D(N+2)

N+2

D(N+3)

N+3

Figure 6. Write Timing

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