PCF2113AU/10/F4,00 NXP Semiconductors, PCF2113AU/10/F4,00 Datasheet - Page 10

• Manufacturer Part Number: PCF2113AU/10/F4,00
• Description: IC LCD CTRLR/DVR
• Manufacturer: NXP Semiconductors

Specifications of PCF2113AU/10/F4,00

• Display Type: LCD
• Configuration: 5 X 8 (Matrix)
• Interface: I²C
• Voltage - Supply: 2.2 V ~ 4 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: Die
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Digits Or Characters: -
• Current - Supply: -
• Lead Free Status / Rohs Status: Details
• Other names: 935264031005

NXP Semiconductors
8. Functional description
PCF2113_FAM_4
Product data sheet
8.1 LCD supply voltage generator
8.2 LCD bias voltage generator
The LCD supply voltage (V
controlled by two internal 6-bit registers: VA and VB.
program these registers. The nominal LCD operating voltage at room temperature is given
by the relationship:
V
With a programmed value from 1 to 63, V
Values producing more than 6.5 V at operating temperature are not allowed. Operation
above this voltage may damage the device. When programming the operating voltage the
V
Values below 2.2 V are below the specified operating range of the chip and therefore are
not allowed.
Value 0 for VA and VB switches off the generator (i.e. VA = 0 in Character mode, VB = 0 in
Icon mode).
Usually register VA is programmed with the voltage for Character mode and register VB
with the voltage for Icon mode.
When V
capacitor.
The generated V
V
at pins V
higher or lower than V
During Direct mode (program DM bit) the internal V
V
consumption during Icon mode and MUX 1:9 (depending on V
properties).
The V
required peak operating voltage of 6.5 V can be generated at any time.
The intermediate bias voltages for the LCD display are also generated on-chip. This
removes the need for an external resistive bias chain and significantly reduces the system
current consumption. The optimum value of V
threshold voltage (V
maximum rate allows V
different multiplex rates are shown in
the given values when switching to the corresponding multiplex rate.
oper(nom)
LCD
LCD
LCDOUT
tolerance and temperature coefficient must be taken into account.
generator and the Direct mode are switched off, an external voltage may be supplied
LCD
LCD
LCDIN
output voltage is directly connected to V
= (integer value of register
generator ensures that, as long as V
is generated on-chip, the V
and V
LCD
th
LCDOUT
is independent of V
) and the number of bias levels. Using a 5-level bias scheme for 1:18
DD2
LCD
Rev. 04 — 4 March 2008
.
LCD
< 5 V for most LCD liquids. The intermediate bias levels for the
(which are connected together). V
) may be generated on-chip. The V
Table
0.08 V) + 1.82 V
LCD
DD
oper(nom)
pins must be decoupled to V
6. These bias levels are automatically set to
and is temperature compensated. When the
LCD
DD
DD2
is in the valid range (2.2 V to 4 V), the
depends on the multiplex rate, the LCD
= 1.90 V to 6.86 V at T
LCD
. This reduces the current
Section 10.10.1
generator is turned off and the
LCDIN
DD2
LCD controllers/drivers
LCD
and LCD liquid
PCF2113x
and V
shows how to
generator is
© NXP B.V. 2008. All rights reserved.
SS
amb
LCDOUT
with a suitable
= 27 C.
may be
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