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PDF NT7651 Data sheet ( Hoja de datos )
| Número de pieza | NT7651 | |
| Descripción | LCD Controller / Driver / 16C x 2 + 160 Icons | |
| Fabricantes | NovaTek | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de NT7651 (archivo pdf) en la parte inferior de esta página. Total 38 Páginas | ||
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PRELIMINARY
NT7651
LCD controller/driver
16Cx2 characters + 160 icons
Features
! Single-chip LCD controller/driver
! 2-line display of up to 16 characters + 160 icons,
1-line display of up to 32 characters + 160 icons,
or 1-line display of up to 16 characters + 80 icons
! 5 × 7 character format plus cursor; 5 × 8 for user
defined symbols
! Icon mode:
Reduced current consumption while displaying
icons only
! On-chip:
DC-DC converter generation of LCD supply
voltage, independent of VDD
Temperature compensation of on-chip
generated VLCD: -8 tο -12 mV/K at 5.0 V
(programmable by instruction)
Generation of intermediate LCD bias voltages
Oscillator requires no external components
(external clock also possible).
! Versatile display functions provided on chip:
Clear display, Return home, Entry mode set,
Display control, Cursor /display shift, Character
blink, Icon blink, Screen configuration, Icon
display control.
! Character Generator ROM:
240 characters (240 × 5 × 8 bits).
! Character Generator RAM:
16 characters (16 × 5 × 8 bits); 4 characters
used to drive 160 icons, 8 characters used if
icon blink feature is used in application.
! Display Data RAM:
80 characters (80 × 8 bits)
! 18 common and 80 segment outputs
! Three duty factors selected by program:
1/2 duty for icon only mode
1/9 duty for single line operation
1/18 duty for normal operation
! Logic supply voltage range:
Chip may be driven with two battery cells.
VDD1 = 1.5 to 3.5 V
! High voltage generator supply voltage range:
VDD2 = 2.2 to 3.5V
! Display supply voltage range:
VLCD = 4.5 to 6.5 V
! Very low current consumption (VDD=3.0V):
Icon mode: < 160 µA (DC-DC on)
Power-down mode: < 2 µA.
Normal mode: < 180 µA (DC-DC on)
! 4 or 8-bit parallel bus and 2-wire I2C-bus interface
! CMOS compatible
! Available in COG FORM
General Description
The NT7651 is a low power CMOS LCD controller and driver designed to drive a dot matrix LCD display of 2-line
by 16 or 1-line by 32 characters with 5 × 8 dot format. All necessary functions for the display are provided in a
single chip, including on-chip generation of LCD bias voltages, resulting in a minimum of external components and
lower system current consumption. The NT7651 interfaces to most microcontrollers via a 4 or 8-bit bus or via the
2-wire I2C-bus. The chip contains a character generator and displays alphanumeric character.
Preliminary
1/38
Ver 0.21
1 page  
NT7651
Pad Description
Pad No.
NT7651 NT7651R
23~26
23~26
27~34
27~34
39~44
45~50
51~56
39~44
45~50
51~56
57~62
57~62
35 35
36
37
38
20
19
10
63
64~71
72
73~152
153
154~161
162
1,2
36
37
38
20
19
10
63
71~64
72
73~152
153
161~154
162
1,2
44
55
6,7 6,7
88
99
11 11
Designation
VDD1
VDD2,3
VSS1
VSS2
VLCD1
VLCD2
E
T1
T2
T3(4)
T4(RC)
T5(M)
T6(D)
COM[17]
COM[1:8]
COM17DUP
SEG[80:1]
COM18DUP
COM[16:9]
COM[18]
SCL
RESET
PD
SDA
R/ W
RS
DB[0]
SA0
I/O Description
P Logic supply voltage.
P
Supply voltage for the high voltage generator. (Always put VDD2
= VDD3).
P Ground pad for all except the high voltage generator.
P Ground pad for the high voltage generator.
P This input used for the generation of the LCD bias levels.
VLCD output pad. If VLCD is generated internally, this pad must
P be connected to VLCD1. If in the application an external VLCD is
used, then the VLCD2 pin must be left open-circuit.
The parallel interface data bus clock input. It is set HIGH to
signal the start of a read or write operation and data in or out of
I the chip on falling edge of the clock.
When I2C-bus is used, the parallel interface pad E must be at
logic 0.
I Test pads.
T1 andT2 must be connected to VSS1,
I
Others are left open-circuit and are not user accessible. No
I connect for user.
I
I
I
LCD common driver outputs. COM17 has two pads COM17
O and COM17DUP.
O LCD segment driver outputs.
LCD common driver outputs. COM18 has two pads COM18
O and COM18DUP.
I2C-bus serial clock input.
I When the parallel bus is used, It must be connected to VSS1 or
VDD1.
I External power-on reset input. (High active)
I Chip power-down mode selects input. Normal operation PD =0.
I2C-bus serial data input/output.
I/O When the parallel bus is used, It must be connected to VSS1 or
VDD1.
Data read/write selects input. Read ( R/W =1) or write
I ( R/W =0). Internal pull-up.
Register selects signal input. Internal pull-up. RS = 0, selects
I the instruction register for write and the busy flag and address
counter for read. RS =1, selects the data register for both read
and write.
Bidirectional data bus (3-state). In 4-bit operations, It must be
I/O left open-circuit. It has its own internal pull-up. In the I2C-bus
I
operation, shared with alternative function input (SA0), It can
allow connecting two NT7651 drivers to the same I2C-bus.
Preliminary
5/38
Ver 0.21
5 Page 
NT7651
upper
lower 4bits
4bits
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
xxxx 0000
1
xxxx 0001
2
xxxx 0010
3
xxxx 0011
4
xxxx 0100
5
xxxx 0101
6
xxxx 0110
7
xxxx 0111
8
xxxx 1000
9
xxxx 1001
10
xxxx 1010
11
xxxx 1011
12
xxxx 1100
13
xxxx 1101
14
xxxx 1110
15
xxxx 1111
16
Figure 5 Character set ‘stand code R’ in CGROM.
Preliminary
11/38
Ver 0.21
11 Page | ||
| Páginas | Total 38 Páginas | |
| PDF Descargar | [ Datasheet NT7651.PDF ] | |
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