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PDF UPD16454A Data sheet ( Hoja de datos )
| Número de pieza | UPD16454A | |
| Descripción | MOS INTEGRATED CIRCUIT | |
| Fabricantes | NEC | |
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DATA SHEET
MOS INTEGRATED CIRCUIT
µPD16454A
The µPD16454A is a single-chip controller/driver for dot matrix LCD, enabling the display of up to 48
alphanumerical and kana characters and symbols (24 characters × 2 lines) each of which is composed of 5 × 7 dots.
On-chip charge pump-type DC/DC converter that enables the µPD16454A to operate on a single 5-V power supply
www.DataSheet4U.comand the chip design aiming at tape carrier package (TCP) mounting make the µPD16454A ideal for portable
equipment and all kinds of data terminals for which downsizing is an important consideration.
FEATURES
• 5 × 7 dot matrix LCD display controller/driver
• 24 characters × 2 lines, 1/14 duty display
• Interface with CPU 4 bits wise
• On-chip ROM and RAM
• Display data RAM (8 × 48 bits)
• Character generator RAM (8 user-defined characters; 5 × 7 × 8 bits)
• Character generator ROM (160 characters; 5 × 7 × 160 bits)
• On-chip LCD driver
• 120 segment signals
• 14 common signals
• Single 5-V power supply
• Doubling DC/DC booster generating 10 V for driving LCDs
• Total power dissipation: 2 mA max.
• On-chip temperature compensation circuit
• TCP mounting enabled
ORDERING INFORMATION
Part number
µPD16454AN-XXX
µPD16454AP
Available as
TCP (TAB)
Chip
TPC formats are created on a custom-made basis. For additional information, contact an NEC sales
representative.
For purchases of chips only, additional documents on quality are required. Contact an NEC sales representative.
Document No. IC-3362A (2nd edition)
(0. D. No. IC-8800)
Date Published March 1997 P
Printed in Japan
© 1994
1 page  
µPD16454A
BLOCK FUNCTIONS
(1) Registers (IR, DR)
This LCD contains both an 8-bit instruction register (IR) and an 8-bit data register (DR).
The IR register stores display clear instruction codes and display data RAM (DDRAM) and character generaotor
RAM (CGRAM) addresses.
The DR register temporarily stores data to be transferred to DDRAM and CGRAM.
The IR and DR registers are selected with the register selector (RS) bit.
www.DataSheet4U.com
RS Register selector
0 IR
1 DR
(2) Busy flag (BF)
When BF = ‘1’, this indicates that the LCD’s internal circuit is currently operating. Therefore, after ascertaining
that BF = ‘0’, it is necessary to read the next instruction or display data.
(3) Address counter (AC)
The AC is a counter that sets addresses in DDRAM and CGRAM. When an address-setting instruction is
written to the IR, the address value is set from the IR to the address counter. At the same time, which of
DDRAM and CGRAM is selected is also determined.
After display data is written in DDRAM or CGRAM, the address counter’s address value is automatically
incremented by 1. Nevertheless, since data in CGRAM consists of 7 bytes characters, the address value is
incremented by 2 only when display data has been written to the 7th line.
(4) Display data RAM (DDRAM)
DDRAM is a RAM that stores display data consisting of 8-bit character codes. The capacity is 8 × 48 bits so
that 48 characters can be stored. The correspondence between DDRAM addresses and display position on
LCD is shown in Fig. 1.
5
5 Page 
DC CHARACTERISTICS (Ta = −30 to +85 °C, VCC = 5 V 5 ± 5%)
Parameter
High-Level Input Voltage 1
Low-Level Input Voltage 1
High-Level Input Voltage 2
Low-Level Input Voltage 2
Hysteresis voltage
High-Level Output Voltage
Low-Level Output Voltage
www.DataSheet4U.com High-Level Input Leak Current
High-Level Input Leak Current
Low-Level Input Lead Current
Common Output Impedance
Segment Output Impedance
Logic Supply Voltage
(Total consumption)
Driver Supply Voltage
(Boosted voltage)
High-Level Output Voltage (V1 pin)
Low-Level Output Voltage (V1 pin)
Symbol
VIH1
VIL1
VIH2
VIL2
VH
VOH
VOL
IIH1
IIH2
IIL
RCOM
RSEG
ICC
VDD
VOH2
VOL2
Conditions
E, RESET, CLK, input excluded
E, RESET, CLK input
IOH = −1 mA
IOL = 1 mA
TEST excluded, VIN = VCC
TEST, VIN = VCC
VIN = 0 V
IO = 50 µA
IO = 50 µA
R1 = 33 kΩ
RP = 27 kΩ
RB = 22 kΩ
fC = 250 kHz
R1 = 33 kΩ
RP = 27 kΩ
RB = 22 kΩ
External capacitor of 1 µF
IOH = −1 mA
VIN (+) = VDD
VIN (−) = 0 V
IOL = 10 µA
VIN (+) = 0 V
VIN (−) = VDD
∗ TYP. is reference value at Ta = +25 °C.
µPD16454A
MIN.
0.7 VCC
0.8 VCC
0.9 VDD
−1
TYP.
0.1
1.5
1.5
1
MAX.
0.3 VCC
0.2 VCC
0.1 VCC
1
6
58
76
2
Unit
V
V
V
V
V
V
V
µA
mA
µA
kΩ
kΩ
mA
1.9 VCC
2 VCC
V
0.9 VDD
V
0.1 VDD
V
VIN (+)
+
−
VIN (−)
Rt
+5 V
R1
Rp
V1 V2 V3 V4 V5
RB RB RB RB RB
Rt : Thermostat
11
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| PDF Descargar | [ Datasheet UPD16454A.PDF ] | |
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