S1D1 Epson Electronics America, Inc., S1D1 Datasheet - Page 563

• Manufacturer Part Number: S1D1
• Description: LCD Controller-driver With Built-in Character ROM
• Manufacturer: Epson Electronics America, Inc.

S1D15B01 Series
6. FUNCTIONAL DESCRIPTION
Microprocessor Interface
Interface type selection
The S1D15B01 series can transfer data via 8-bit bi-
directional data buses (D7 to D0) or via serial data input
(SI). Through selecting the P/S pin polarity to the HIGH
Parallel interface
When the parallel interface has been selected (P/S=
HIGH), then it is possible to connect directly to either an
Moreover, the S1D15B01 series identifies the data bus
signal according to A0, RD(E), WR(R/W) signals, as
shown in Table 3.
Serial interface
When the serial interface has been selected (P/S=
LOW),only writing display data and control data is
possible by four input signals. The serial data input (SI)
and serial clock input (SCL) are enabled when CS is
low. When chip is not selected, the shift register and
counter which compose serial interface are reset.
The serial data is read from the serial data input pin in
the rising edge of the serial clocks D7,D6 through D0,
in this order. This data is converted to 8 bits parallel data
13–8
Table 1
Table 2
Table 3
HIGH:Parallel Input
LOW:Serial Input
HIGH:6800-series MPU bus
LOW:8080-series MPU bus
Common
A0
1
1
0
– : HIGH, LOW or Open
P/S
C86
6800-series
R/W
1
0
0
CS
CS
CS
8080-series
RD
A0
A0
A0
0
1
1
CS
CS
CS
RD
RD
WR
–
1
0
0
A0
A0
A0
EPSON
WR C86
WR C86
–
RD
RD
Writes control data (command)
E
Reads the display data
Writes the display data
or LOW, it is possible to select either 8-bit parallel data
input or 8-bit serial data input as shown in Table 1.
8080-series MPU or a 6800-series MPU (as shown in
Table 2) by selecting C86 pin to either HIGH or LOW.
in the rising edge of the eighth serial clock for the
processing.
The A0 input is used to determine whether the serial
data input is display data or command data; when
A0=HIGH, the data is display data, and when A0=LOW
then the data is command data. The A0 input is read and
used for detection every 8th rising edge of the serial
clock after the chip becomes active.
Figure 1 is a serial interface signal chart.
–
R/W
WR
WR
Function
D7
D7
SI
D7 to D0
D7 to D0
D7 to D0
SCL
D6
D6
D5 to D0
D5 to D0
–
Rev. 1.1a