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ST7632 датащи(PDF) 22 Page - Sitronix Technology Co., Ltd.

номер детали ST7632
подробное описание детали  4K Color Dot Matrix LCD Controller/Driver
PDF  96 Pages
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производитель  SITRONIX [Sitronix Technology Co., Ltd.]
домашняя страница  http://www.sitronix.com.tw
Logo SITRONIX - Sitronix Technology Co., Ltd.

ST7632 датащи(HTML) 22 Page - Sitronix Technology Co., Ltd.

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ST7632
Ver 1.7
22/96
2006/08/15
7-2 ACCESS TO DDRAM AND INTERNAL REGISTERS
ST7632 realizes high-speed data transfer because the access from MPU is a sort of pipeline processing done via the bus
holder attached to the internal, requiring the cycle time alone without needing the wait time.
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 is started. When MPU reads data from the DDRAM, the first read cycle is
dummy and the bus holder holds the data read in the dummy cycle, and then it read from the bus holder to the system bus
in the succeeding read cycle. Fig. 7.2.1 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
/WR
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 7.2.1



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