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| 型号： | ADP5588ACPZ-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/28页 |
| 文件大小： | 0K |
| 描述： | IC KEYPAD SCANNER GPIO PORT EXP |
| 标准包装： | 1 |
| 应用： | 键盘和警报系统 |
| 接口： | I²C |
| 电源电压： | 1.8 V ~ 3 V |
| 封装/外壳： | 24-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 24-LFCSP-VQ（4x4） |
| 包装： | 标准包装 |
| 安装类型： | 表面贴装 |
| 产品目录页面： | 799 (CN2011-ZH PDF) |
| 其它名称： | ADP5588ACPZ-R7DKR |
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Mobile I/O Expander and
QWERTY Keypad Controller
Data Sheet
FEATURES
18-GPIO port expander or 10 × 8 keypad matrix
GPIOs configurable to GPIs, GPOs, and keypad rows or
columns
Dual light sensor inputs (C8 and C9)
I2C interface
I2C register read autoincrement
1.8 V to 3.0 V operation
Keypad lock capability
Open-drain interrupt output
Key press and key release interrupts
GPI interrupt with level programmability
Programmable pull-ups
Key event counter with overflow interrupt
50 μs debounce on the reset line and GPIs
1 μA typical idle current, 55 μA typical polling current drain
for one key press
Small 4 mm × 4 mm LFCSP package
APPLICATIONS
Keypad and I/O expander designed for QWERTY type phones
that require a large keypad matrix
FUNCTIONAL BLOCK DIAGRAM
C8
C9
C8
C9
18
17
19
21
23
22
20
24
CONTROL
REGISTERS
CONTROL
INTERFACE
REF
VOLTAGE
REF
VOLTAGE
R7
R6
R5
R4
R3
R2
R1
R0
C0
C1
C2
C3
C4
C5
C6
C7
C9
C8
GND
VCC
SCL
SDA
RST
INT
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
2
07673-
001
ADP5588
Figure 1.
GENERAL DESCRIPTION
The ADP5588 is an I/O port expander and keypad matrix
designed for QWERTY type phones that require a large keypad
matrix and expanded I/O lines. I/O expander ICs are used in
mobile platforms as a solution to the limited number of GPIOs
available in the main processor.
In its small 4 mm × 4 mm package, the ADP5588 contains
enough power to handle all key scanning and decoding and flag
the processor of key presses and releases via the I2C interface
and interrupt. It frees the main microprocessor from having to
monitor the keypad, thereby minimizing current drain and
increasing processor bandwidth. It is also equipped with a
buffer/FIFO and key event counter to handle and keep track of
up to 10 unprocessed key or GPI events with overflow wrap and
interrupt capability.
The ADP5588 has a keylock capability with an option to trigger
or not trigger an interrupt at key presses and releases. All com-
munication to the main processor is done using one interrupt line
and two I2C-compatible interface lines. The ADP5588 can be
configured to have a keypad matrix of up to 8 rows × 10 columns
(a maximum of 80 keys).
When used for smaller keypad matrices, unused row and
column pins can be reconfigured to act as general-purpose
inputs, outputs, or light sensor inputs. R0, R1, R2, R3, R4, R5,
R6, and R7 denote the row pins of the matrix, while C0, C1, C2,
C3, C4, C5, C6, C7, C8, and C9 denote the column pins. At
power-up, all rows and columns default as GPIs and must be
programmed to function as part of the keypad matrix, GPOs, or
light sensor inputs. In addition to keypad and GPIO functionalities,
C8 and C9 can also be configured as light sensor inputs.
When configured as keypad lines, the function of the C8 and
C9 lines is straightforward: the control interface disconnects
these lines from the comparator inputs, disables the light sensor
comparator, and connects them to the keypad columns of the
keypad matrix. When used as light sensor comparator inputs,
the control interface disconnects these pins from the keypad,
enables the comparators, and connects these lines to the com-
parator inputs. Two external capacitors (0.1 μF) are required
when these pins are configured as light sensor inputs. When
used as GPIOs, these pins are removed from the keypad and the
light sensor interface, and the light sensor comparators are
disabled, along with the logic for the sensors.
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2008–2012 Analog Devices, Inc. All rights reserved.
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| ADP5588ACPZ-R7B2 | 功能描述:Keypads and Alarm Systems Interface 24-LFCSP-WQ (4x4) 制造商:analog devices inc. 系列:- 包装:带卷（TR） 零件状态:上次购买时间 应用:键盘和警报系统 接口:I2C 电压 - 电源:1.8 V ~ 3 V 封装/外壳:24-WFQFN 裸露焊盘，CSP 供应商器件封装:24-LFCSP-WQ（4x4） 安装类型:表面贴装 标准包装:1 |
| ADP5588-EVALZ | 功能描述:BOARD EVAL ADP5588 KEYPAD/GPIO RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:- 主要目的:电信，线路接口单元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要属性:T1/J1/E1 LIU 次要属性:- 已供物品:板，电源，线缆，CD 其它名称:82EBV2081 |
| ADP5588XCPZ-R7 | 功能描述:Keypads and Alarm Systems Interface 制造商:analog devices inc. 系列:- 包装:- 零件状态:上次购买时间 应用:键盘和警报系统 接口:I2C 电压 - 电源:1.8 V ~ 3 V 封装/外壳:- 供应商器件封装:- 安装类型:- 标准包装:1 |
| ADP5588XCPZ-X2-R7 | 功能描述:Keypads and Alarm Systems Interface 制造商:analog devices inc. 系列:- 包装:- 零件状态:上次购买时间 应用:键盘和警报系统 接口:I2C 电压 - 电源:1.8 V ~ 3 V 封装/外壳:- 供应商器件封装:- 安装类型:- 标准包装:1 |
| ADP5589ACBZ-00-R7 | 功能描述:IC PORT EXPANDER 19I/O 25WLSCP RoHS:是 类别:集成电路 (IC) >> 接口 - 专用 系列:* 特色产品:NXP - I2C Interface 标准包装:1 系列:- 应用:2 通道 I²C 多路复用器 接口:I²C，SM 总线 电源电压:2.3 V ~ 5.5 V 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:剪切带 (CT) 安装类型:表面贴装 产品目录页面:825 (CN2011-ZH PDF) 其它名称:568-1854-1 |
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