ST7588T 데이터 시트보기 (PDF) - Sitronix Technology Co., Ltd.

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ST7588T

81 x 132 Dot Matrix LCD Controller/Driver

Sitronix Technology Co., Ltd. 

ST7588T

Data Transfer

The ST7588T 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 12. Moreover, 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 13. 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 signal

A0

/WR

D0 to D7

N

D(N) D(N+1) D(N+2) D(N+3)

Internal signals

/WR

BUS HOLDER

N

COLUMN ADDRESS

D(N) D(N+1) D(N+2) D(N+3)

N

N+1 N+2 N+3

Figure 12 Write Timing

MPU signal

A0

/WR

/RD

D0 to D7

N

Dummy D(N) D(N+1)

Internal signals

/WR

/RD

BUS HOLDER

N

D(N) D(N+1) D(N+2)

COLUMN ADDRESS

N

D(N) D(N+1) D(N+2)

Figure 13 Read Timing

Ver 1.3

26/61

2007/09/20

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