ST7556 Sitronix Technology, ST7556 Datasheet - Page 20
ST7556
Manufacturer Part Number
ST7556
Description
65 x 102 Dot Matrix LCD Controller/Driver
Manufacturer
Sitronix Technology
Datasheet
1.ST7556.pdf
(43 pages)
- Current page: 20 of 43
- Download datasheet (468Kb)
www.DataSheet4U.com
ST7556
Oscillator
The on-chip oscillator provides the clock signal for the display system. No external components are required and the OSC
input must be connected to VDD. An external clock signal, if used, is connected to this input.
Display Timing Generator Circuit
This circuit generates some signals to be used for displaying LCD. The display clock, CL (internal), generated by oscillation
clock, generates the clock for the line counter and the signal for the display data latch. The line address of on-chip RAM is
generated in synchronization with the display clock and the display data latch circuit latches the 102-bit display data in
synchronization with the display clock. The display data, which is read to the LCD driver, is completely independent of the
access to the display data RAM from the microprocessor. The display clock generates an LCD AC signal (M) which
enables the LCD driver to make a AC drive waveform, and also generates an internal common timing signal and start
signal to the common driver. Driving waveform and internal timing signal are shown in Figure 8.
Ver 2.2
CL(Internal)
FR(Internal)
M(Internal)
COM0
COM1
SEGn
64
65
1
2
3
4
Fig 8. 2-frame AC Driving Waveform (Duty Ratio: 1/65)
5
6
7
8
9
10
11
12
20/43
57
58
59
60
61
62
63
64
65
1
2
3
4
2005/10/05
5
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
LCD
1
2
3
4
SS
LCD
1
2
3
4
SS
LCD
1
2
3
4
SS
Related parts for ST7556
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
THYRISTORS
Manufacturer:
ST Microelectronics
Datasheet:
Part Number:
Description:
ADJUSTABLE INVERTING NEGATIVE OUTPUT CURRENT MODE PWM REGULATORS
Manufacturer:
ST Microelectronics
Datasheet:
Part Number:
Description:
0.25A SCRs
Manufacturer:
ST Microelectronics
Datasheet:
Part Number:
Description:
0.8A SCRs
Manufacturer:
ST Microelectronics
Datasheet:
Part Number:
Description:
Smartcard MCU With 4 additional I/0
Manufacturer:
ST Microelectronics
Datasheet:
Part Number:
Description:
SERIAL 2K (256 x 8) EEPROM
Manufacturer:
ST Microelectronics
Datasheet:
Part Number:
Description:
Search -----> STP10NB50FP
Manufacturer:
ST Microelectronics
Datasheet:
Part Number:
Description:
Search ---> STP12NB30
Manufacturer:
ST Microelectronics
Datasheet:
Part Number:
Description:
Search -----> STP13NK50Z
Manufacturer:
ST Microelectronics
Datasheet:
Part Number:
Description:
(MSS40 / MSS50) BACK TO BACK SCR MODULE
Manufacturer:
ST Microelectronics
Datasheet:
Part Number:
Description:
Dmos Programmable High Speed Unipolar Stepper Motor Driver
Manufacturer:
ST Microelectronics, Inc.
Datasheet:
Part Number:
Description:
LOW Votage Telephone Speech Circuit
Manufacturer:
ST Microelectronics, Inc.
Datasheet:
Part Number:
Description:
Technical Article
Manufacturer:
ST Microelectronics, Inc.
Datasheet:
Part Number:
Description:
Thyristormodule
Manufacturer:
ST Microelectronics, Inc.
Datasheet:
Part Number:
Description:
SCR
Manufacturer:
ST Microelectronics
Datasheet: