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3: COMMANDS AND COMMAND REGISTERS
3.3.4
Memory Control Commands
MWRITE
This command is used by the MPU to place the S1D13700 in the data input state before writing data to
display memory. Each time the WR# signal is input following this command, the S1D13700 automatically
modifies the cursor address at which to write display memory according to the CSRDIR value. This allows the
MPU to write two or more consecutive items of data to display memory.
MSB
C
0
P1
P2
Pn
P1, P2, ..., Pn: Display data
MREAD
This command is used to place the S1D13700 in the data output state and store the contents of display
memory (specified by the cursor address) in the data bus buffer before reading data from display memory.
Each time the RD# signal is input following this command, the read cursor address of display memory is
automatically modified according to the CSRDIR value, and read data is stored in the data bus buffer. Because
the command is executed in a manner similar to pipelined processing, high-speed readout limited only by the
MPU cycle time is possible.
When the cursor is displayed, the read data and cursor positions do not match (with the cursor two positions
ahead).
MSB
0
C
P1
P2
Pn
44
1
0
0
1
0
0
0
LSB
0
0
1
0
LSB
0
1
1
EPSON
n ≥ 1
Read
data
n ≥ 1
S1D13700 Technical Manual
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