OM6290 NXP Semiconductors, OM6290 Datasheet - Page 17

• Manufacturer Part Number: OM6290
• Description: DEMO BOARD LCD GRAPHIC DRIVER
• Manufacturer: NXP Semiconductors

Specifications of OM6290

• Main Purpose: Displays, LCD Controller
• Embedded: Yes, MCU, 16/32-Bit
• Utilized Ic / Part: PCF2119, PCF8531, PCF8576
• Primary Attributes: Character, Graphic and Segment LCD Drivers
• Secondary Attributes: JTAG, I²C, UART & USB Interfaces
• Description/function: Demo Board
• Interface Type: USB, I2C, JTAG, UART
• Data Bus Width: 4 bit, 8 bit, 16 bit
• Operating Voltage: 1.8 V to 5.5 V
• For Use With/related Products: PCF8576DT, PCF2119S, PCF8531
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 568-4703

Philips Semiconductors
6.16
The display blinking capabilities of the PCF8576 are very
versatile. The whole display can be blinked at frequencies
selected by the BLINK command. The blinking frequencies
are integer multiples of the clock frequency; the ratios
between the clock and blinking frequencies depend on the
mode in which the device is operating, as shown in
Table 3.
An additional feature is for an arbitrary selection of LCD
segments to be blinked. This applies to the static and
1 : 2 LCD drive modes and can be implemented without
any communication overheads. By means of the output
Table 3 Blinking frequencies
2001 Oct 02
Universal LCD driver for low multiplex rates
BLINKING MODE
Blinker
0.5 Hz
2 Hz
1 Hz
Off
NORMAL OPERATING
MODE RATIO
------------------- -
184320
------------------- -
368640
--------------- -
92160
f
f
f
clk
clk
clk
17
bank selector, the displayed RAM banks are exchanged
with alternate RAM banks at the blinking frequency. This
mode can also be specified by the BLINK command.
In the 1 : 3 and 1 : 4 multiplex modes, where no alternate
RAM bank is available, groups of LCD segments can be
blinked by selectively changing the display RAM data at
fixed time intervals.
If the entire display is to be blinked at a frequency other
than the nominal blinking frequency, this can be effectively
performed by resetting and setting the display enable bit E
at the required rate using the MODE SET command.
POWER-SAVING MODE
RATIO
--------------- -
15360
--------------- -
30720
--------------- -
61440
f
f
f
clk
clk
clk
NOMINAL BLINKING
FREQUENCY
Product specification
blinking off
0.5 Hz
2 Hz
1 Hz
PCF8576