S6B0717X01-XXX0 查看數據表（PDF） - Samsung

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S6B0717X01-XXX0

55 COM / 100 SEG DRIVER & CONTROLLER FOR STN LCD

Samsung 

S6B0717

55 COM / 100 SEG DRIVER & CONTROLLER FOR STN LCD

Data Transfer

The S6B0717 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

/WR

DB0 to DB7

N

Internal signals

/WR

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 4. Write Timing

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