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ST7530 датащи(PDF) 21 Page - Sitronix Technology Co., Ltd.

номер детали ST7530
подробное описание детали  65K Color Dot Matrix LCD Controller/Driver
PDF  100 Pages
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производитель  SITRONIX [Sitronix Technology Co., Ltd.]
домашняя страница  http://www.sitronix.com.tw
Logo SITRONIX - Sitronix Technology Co., Ltd.

ST7530 датащи(HTML) 21 Page - Sitronix Technology Co., Ltd.

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ST7530
Ver 1.8
21/100
2006/9/18
8.2 ACCESS TO DDRAM AND INTERNAL REGISTERS
Since ST7530 access from MPU by pipeline processing via the bus holder attached to the internal that requires only the
cycle time but no waiting time, it can achieves high-speed data transfer.
For example, when MPU writes data to the DDRAM, the data is once held by the bus holder and then written to the
DDRAM before the succeeding write cycle start. When MPU reads data from the DDRAM, the first read cycle is dummy
and the data read in the dummy cycle is held by the bus holder, and then it read from the bus holder to the system bus in
the succeeding read cycle. Fig. 8.2.1 illustrates these relations.
N
D(N)
D(N+1) D(N+2)
D(N+3)
N
D(N)
D(N+1)
D(N+2)
D(N+3)
N
N+1
N+2
N+3
MPU signal
A0
/WR
DATA
Internal signals
/WR
BUS HOLDER
COLUMN ADDRESS
Write
Operation
N
Dummy
D(N)
D(N+1)
MPU signal
A0
/WR
DATA
Internal signals
/W R
COLUMN ADDRESS
/RD
N
D(N)
D(N+1)
D(N+2)
D(N)
D(N+1)
D(N+2)
N
/RD
BUS HOLDER
Read
Operation
Fig 8.2.1



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