DOCUMENT NO. REV.NO
PAGE
STANDARD
NAME
00 7/20
4.11
Connecter Through Hole Location
Fig-8 15-pin Through Hole Dimensions
4.12
Pattern Details
5.FUNCTION DESCRIPTIONS
5.1 Registers in VFD Controller
The VFD controller has two 8-bit registers, an instruction register (IR) and a data register (DR). IR stores
instruction codes, such as display clear and cursor shift, and address information for DD-RAM and CG-RAM
The IR can only be written from the host MPU.DR temporarily stores data to be written into DD-RAM or
CG-RAM and temporarily stores data to be read from DD-RAM or CG-RAM. Data written into the DR from
the MPU is automatically written into DD-RAM or CG-RAM by an internal operation. The DR is also used for
data storage when reading data from DD-RAM or CG-RAM. When address information is written into the IR ,
data is read and then stored into the DR from DD-RAM or CG-RAM by internal operation. Data transfer
between MPU is then completed when the MPU reads the DR. After the read, data in DD-RAM or CG-RAM
at the next address is send to the DR for the next read from the MPU. By the register selector (RS) signal.
These two registers can be selected (See Table-8).
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