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ADP5587ACPZ-R7 Folha de dados(PDF) 20 Page - Analog Devices

Nome de Peças ADP5587ACPZ-R7
Descrição Electrónicos  Mobile I/O Expander and QWERTY Keypad Controller
PDF  24 Pages
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Fabricante Electrônico  AD [Analog Devices]
Página de início  http://www.analog.com
Logo AD - Analog Devices

ADP5587ACPZ-R7 Folha de dados(HTML) 20 Page - Analog Devices

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ADP5587
Rev. 0 | Page 20 of 24
APPLICATIONS INFORMATION
CONTROL
REGISTERS
HOST
PROCESSOR
CONTROL
INTERFACE
C9
C8
ENABLE 2 (GPO)
BACKLIGHT
ENABLE (GPO)
A0
A1
A2
A3
A4
A5
A6
A7
B0
B1
B2
B3
B4
B5
B6
B7
C0
C1
C2
C3
C4
C5
C6
C7
D0
D1
D2
D3
D4
D5
D6
D7
E0
E1
E2
E3
E4
E5
E6
E7
F0
F1
F2
F3
F4
F5
F6
F7
G0
G1
G2
G3
G4
G5
G6
G7
H0
H1
H2
H3
H4
H5
H6
H7
I0
I1
I2
I3
I4
I5
I6
I7
J0
J1
J2
J3
J4
J5
J6
J7
SCL
SDA
VCC
GND
VCC
SCL
GPI1
GPI2
SDA
RST
INT
19
21
23
22
18
17
20
24
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
VCC
BACKLIGHT
DRIVER
PWM OUTPUT
ADP5587
VCC
RST
INT
Figure 14. ADP5587 Detailed Application Block Diagram
APPLICATIONS OVERVIEW
The ADP5587 is designed to complement host processors in
a variety of ways. Its versatility makes it the ideal solution for
mobile platforms that require extended keypads and GPIO
expanders. The programmable registers give the designer the
flexibility to configure any or all of its GPIOs in a variety of
ways. Figure 14 shows a detailed application diagram.
KEYPAD CURRENT
Keypad current drain varies based on how many keys and how
many rows and columns are pressed during multiple key
presses. Table 34 shows the typical current drain for a single key
press and for two key presses.
Table 34. Typical Current Drain
Number of Key Presses
Conditions1
Typical
Unit
1
VCC = 1.8 V to 3.0 V
55
μA
2
VCC = 1.8 V to 3.0 V
100
μA
1
TA = TJ = −40°C to +85°C.



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