GDM240128A Datasheet, PDF (16/29 Pages) List of Unclassifed Manufacturers – LCD MODULE

User’s Manual
attribute function is being used, this command is not available.
5-6-10．Bit set/reset: no parameter
1
1
1
1
N3 N2 N2 N0
This command is used to set or reset a bit of the byte specified by the
address pointer.
N3=1, set; N3=0, reset. N2~N0 corresponds to the D0~D7 bit.
5-7. Module and MPU connection
MPU uses data bus and control lines to control the module by means of direct
storage access or I/O access. Interface circuit is shown in following diagram:
MPU: 8031
Data bus of 8031 is connected directly to the data bus of module. RD and WR of
8031 act as the read/write control signal of module. CE can be decoded by
address bus. For example: output Y0 of IC 138 as CE.（When test the module
independently, CE could be grounded directly. ) Output A0 of 8031 address bus as
C/D. A0=1 stands for the address of command；A0=0 stands for address of data.
Each Subprogram is as follows:
（1） Status read
Registers to be used: R0, A;
BF: MOV R0, #01H
MOVX A, @ R0
RET
output register: A store status
; address of command
; read status
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