ML9058 Datasheet, PDF (15/76 Pages) OKI electronic componets – 132-Channel LCD Driver with Built-in RAM for LCD Dot Matrix Displays

OKI Semiconductor
FEDL9058-01
ML9058
PIN DESCRIPTION
Function
Pin name
Number
of pins
I/O
Description
These are 8-bit bi-directional data bus pins that can be connected to
8-bit standard MPU data bus pins. When a serial interface is selected
(P/S = “L”):
DB0 to
DB7
DB7: Serial data input pin (SI)
8
I/O DB6: Serial clock input pin (SCL)
In this case, DB0 to DB5 will be in the high impedance state. DB0 to
DB7 will all be in the high impedance state when the chip select is in
the inactive state.
Fix the DB0 to DB5 pins at “H” or “L” level.
Normally, the lowest bit of the MPU address bus is connected and
used for distinguishing between data and commands.
A0
1
I _{A0 = “H”: Indicates that DB0 to DB7 is display data.}
A1 = “L”: Indicates that DB0 to DB7 is control data.
RES
1
I
Initial setting is made by making RES = “L”. The reset operation is
made during the active level of the RES signal.
CS1
These are the chip select signals. The Chip Select of the LSI
2
I becomes active when CS1 is “L” and also CS2 is “H” and allows the
CS2
input/output of data or commands.
MPU
Interface
RD
(E)
The active level of this signal is “L” when connected to an 80-series
MPU. This pin is connected to the RD signal of the 80-series MPU,
and the data bus of the ML9058 goes into the output state when this
signal is “L”.
1
I The active level of this signal is “H” when connected to a 68-series
MPU. This pin will be the Enable and clock input pin when connected
to a 68-series MPU.
When a serial interface is selected (P/S = “L”), fix this pin at “H” or “L”
level.
The active level of this signal is “L” when connected to an 80-series
MPU. This pin is connected to the WR signal of the 80-series MPU.
The data on the data bus is latched into the ML9058 at the rising edge
of the WR signal.
WR
(R/W)
1
I ^{When connected to a 68-series MPU, this pin becomes the input pin}
for the Read/Write control signal.
R/W = “H”: Read, R/W = “L”: Write
When a serial interface is selected (P/S = “L”), fix this pin at “H” or “L”
level.
This is the pin for selecting the MPU interface type.
C86
1
I C86 = “H”: 68-Series MPU interface.
C86 = “L”: 80-Series MPU interface.
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