OM6290 NXP Semiconductors, OM6290 Datasheet - Page 55

• 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

NXP Semiconductors
16. Application information
PCF2119X
Product data sheet
16.1 General application information
16.2 Power supply connections for internal V
The required minimum value for the external capacitors in an application with the
PCF2119x are: C
Higher capacitor values are recommended for ripple reduction.
For COG applications the recommended ITO track resistance is to be minimized for the
I/O and supply connections. Optimized values for these tracks are below 50 Ω for the
supply and below 100 Ω for the I/O connections. Higher track resistance reduce
performance and increase current consumption. To avoid accidental triggering of
Power-On Reset (POR) (especially in COG applications), the supplies must be
adequately decoupled. Depending on power supply quality, V
above the specified minimum.
When external LCD supply voltage is supplied, V
avoid any stray current, and V
The PCF2119x I
resistors are connected to a 5 V ±10 % supply.
Fig 37. Recommended V
Fig 38. Recommended V
Drawings are showing alternative circuits.
Decoupling capacitors are not shown in the drawings.
The value of the capacitor should be at least 100 nF.
1.5 V to 5.5 V
2.2 V to 4.0 V
All information provided in this document is subject to legal disclaimers.
2
GND
ext
C-bus interface is compatible with systems, where the I
from pins V
Rev. 9 — 14 April 2011
V
V
V
V
V
DD1
DD2
DD3
SS1
SS2
DD
LCD
013aaa114
connections for internal V
connections for internal V
LCDIN
LCD
to V
must be connected to V
V
SS2
SS
= 100 nF and for pins V
V
V
V
LCDIN
LCDOUT
LCDSENSE
013aaa116
LCDOUT
LCD
LCD
LCD
2.2 V to 4.0 V
should be left open-circuit to
generation
generation
generation
LCDSENSE
DD1
GND
LCD controllers/drivers
may have to be risen
DD
PCF2119x
.
to V
V
V
V
V
V
DD1
DD2
DD3
SS1
SS2
© NXP B.V. 2011. All rights reserved.
013aaa115
2
SS
C pull-up
= 470 nF.
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