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參數(shù)資料
| 型號： | ADP5587ACPZ-1-R7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 2/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC I/O EXPANDER/KEYBRD CTRLR |
| 標準包裝： | 1,500 |
| 類型： | I²C 端口擴展器 |
| 應用： | 移動電話 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-WFQFN 裸露焊盤，CSP |
| 供應商設備封裝： | 24-LFCSP-WQ（4x4） |
| 包裝： | 帶卷 (TR) |
ADP5587
Data Sheet
Rev. D | Page 10 of 24
Auto-Increment
The ADP5587 features automatic increment during I2C read
access, which allows the user to increment the address pointer
without the need to send a read command for subsequent
addresses. This minimizes processor intervention and, therefore,
saves processor bandwidth and current drain. Bit 7 of Register 0x01
must be set to initiate auto-increment (see Figure 17 for the full
write and read sequence).
Key Event Interrupt
On a key event (KE) interrupt, the processor reads the interrupt
status register to determine the cause of the interrupt. If the
KE_INT bit in Register 0x02 is set, the processor reads the key
event count from the KEC [3:0] field in Register 0x03 to determine
the number of events. After reading all the events from the
FIFO, it then reads the KEC field again (in Register 0x03) to
make sure that no new events have come in. After all the events
are read, the KEC field is decremented to zero (KEC = 0), and
the KE_INT bit can be cleared by writing a 1 to it. Both key
presses and key releases are capable of generating key event
interrupts. The KE_INT bit cannot be cleared, and the INT pin
cannot be deasserted, until the FIFO is cleared of all events.
KEYPAD MODE
KEC
REG. 0x1D
THROUGH REG. 0x1F
REG. 0x03
READ KE(s) TO CLEAR
INT DRIVE
KE_INT
REG. 0x02
WRITE 1 TO CLEAR
KE_IEN
REG. 0x01
AND
08612-
007
Figure 11. Key Event Interrupt Generation
START
MASK TIMER = 0
KEY PRESS
DETECTED
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
GENERATE
KE INTERRUPT
START MASK TIMER
MASK TIMER
EXPIRES
MASK TIMER
EXPIRES
GENERATE
KEYLOCK INTERRUPT
FIRST UNLOCK
KEY DETECTED
SECOND UNLOCK
KEY DETECTED
START UNLOCK1 TO UNLOCK2
UNLOCK1 TO
UNLOCK2
TIMER EXPIRES
KEY PRESS
DETECTED
START UNLOCK1 TO UNLOCK2
FIRST UNLOCK
KEY DETECTED
GENERATE
KEYLOCK INTERRUPT
SECOND UNLOCK
KEY DETECTED
UNLOCK1 TO
UNLOCK2
TIMER EXPIRES
NO
08612-
008
Figure 12. Keypad Lock Interrupt Mask Timer Flowchart
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ADP5587ACPZ-R7 | 功能描述:IC EXPANDER/KEYBOARD CTRLR RoHS:是 類別:集成電路 (IC) >> 專用 IC 系列:- 標準包裝:1,000 系列:- 類型:音頻視頻切換 應用:TV 開關 安裝類型:表面貼裝 封裝/外殼:36-USO 供應商設備封裝:- 包裝:帶卷 (TR) 其它名稱:AN15851ATR |
| ADP5587CP-EVALZ | 功能描述:EVAL BOARD FOR ADP5587 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估演示板和套件 系列:- 標準包裝:1 系列:- 主要目的:電信，線路接口單元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要屬性:T1/J1/E1 LIU 次要屬性:- 已供物品:板，電源，線纜，CD 其它名稱:82EBV2081 |
| ADP5588 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Keypad I/O Expander |
| ADP5588ACPZ-R7 | 功能描述:IC KEYPAD SCANNER GPIO PORT EXP RoHS:是 類別:集成電路 (IC) >> 接口 - 專用 系列:- 特色產(chǎn)品:NXP - I2C Interface 標準包裝:1 系列:- 應用:2 通道 I²C 多路復用器 接口:I²C，SM 總線 電源電壓:2.3 V ~ 5.5 V 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:16-TSSOP 包裝:剪切帶 (CT) 安裝類型:表面貼裝 產(chǎn)品目錄頁面:825 (CN2011-ZH PDF) 其它名稱:568-1854-1 |
| ADP5588ACPZ-R7B2 | 功能描述:Keypads and Alarm Systems Interface 24-LFCSP-WQ (4x4) 制造商:analog devices inc. 系列:- 包裝:帶卷（TR） 零件狀態(tài):上次購買時間 應用:鍵盤和警報系統(tǒng) 接口:I2C 電壓 - 電源:1.8 V ~ 3 V 封裝/外殼:24-WFQFN 裸露焊盤，CSP 供應商器件封裝:24-LFCSP-WQ（4x4） 安裝類型:表面貼裝 標準包裝:1 |
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