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LH1595 Datasheet(PDF) 10 Page - Sharp Corporation

Part # LH1595
Description  80-Segment and 17-Common Outputs LCD Driver IC with A Built-in CGROM
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Manufacturer  SHARP [Sharp Corporation]
Direct Link  http://sharp-world.com/
Logo SHARP - Sharp Corporation

LH1595 Datasheet(HTML) 10 Page - Sharp Corporation

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LH1594/LH1595
2. FUNCTIONAL DESCRIPTION
2.1. MPU Interface
2.1.1. INTERFACE TYPE SELECTION
The LH1594/LH1595 transfer data through 8-bit
parallel I/O (D7 to D0) or serial data input (SDA,
SCL).
The selection between parallel interface and serial
interface is made by setting the state of P/S pin to
"H" or "L".
P/S
I/F TYPE
CSB
RS
RDB
WRB
M86
SDA
SCL
DATA BUS
H
Parallel
CSB
RS
RDB
WRB
M86
D7 to D0
L
Serial
– (LH1594)
CSB (LH1595)
– (LH1594)
RS (LH1595)
SDA
SCL
2.1.2. PARALLEL INPUT
The LH1594/LH1595 can transfer data in parallel
by directly connecting 8-bit MPU to the data bus
when parallel interface is selected with P/S pin.
As an 8-bit MPU, either 80-family MPU interface or
68-family MPU interface is selected with M86 pin.
M86
MPU TYPE
CSB
RS
RDB
WRB
DATA
H
68-family MPU
CSB
RS
E
R/W
D7 to D0
L
80-family MPU
CSB
RS
RDB
WRB
D7 to D0
2.1.3. DATA IDENTIFICATION
The LH1594/LH1595 can identify the data of 8-bit data
bus by combinations of RS, RDB and WRB signals.
RS
68-FAMILY
R/W
80-FAMILY
FUNCTION
RDB
WRB
0
1
0
1
Reads out busy flags
0
0
1
0
Writes to commands
1
0
1
0
Writes to data RAM
1
1
0
1
Reads from data RAM


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