GSM7980 Syntec Semiconductor, GSM7980 Datasheet - Page 2

• Manufacturer Part Number: GSM7980
• Description: Dot Matrix LCD Controller/Driver
• Manufacturer: Syntec Semiconductor

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LCD Controller / Driver
B l o c k D i a g r a m
DB4 to
DB7
DB0 to
DB3
RS
RW
E
GND
Vcc
Syntek Semiconductor Co., Ltd.
Interface
Output
Input/
Buffer
MPU
Circuit
Reset
Register (IR)
Instruction
Instruction
Register
Decoder
Busy
Data
(DR)
Flag
(CGRAM)
Character
generator
64 bits
OSC1
Address
RAM
Counter
CPG
V1
Parallel/Serial converter
data RAM
(DDRAM)
80x8 bits
OSC2
Display
2 / 2
Attribute Circuit
(CGROM)
Character
generator
9,920 bits
ROM
V2
and
V3
register
Generator
40-bit
shift
Timing
controller
Cursor
Blink
and
V4
register
circuit
16-bit
40-bit
latch
shift
V5
Common
Segment
LCD Drive
Signal
Driver
Signal
Driver
Selector
Voltage
ISSUE DATE :
CL1
CL2
M
GSM7980
COM1 to
COM16
SEG1 to
SEG40
D