參數資料
| 型號： | PCA9555D,112 |
| 廠商： | NXP Semiconductors |
| 文件頁數： | 7/34頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC I/O EXPANDER I2C 16B 24SOIC |
| 產品培訓模塊： | I²C Bus Fundamentals |
| 特色產品： | NXP - I2C Interface |
| 標準包裝： | 30 |
| 接口： | I²C，SM 總線 |
| 輸入/輸出數： | 16 |
| 中斷輸出： | 是 |
| 頻率 - 時鐘： | 400kHz |
| 電源電壓： | 2.3 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-SOIC（0.295"，7.50mm 寬） |
| 供應商設備封裝： | 24-SO |
| 包裝： | 管件 |
| 包括： | POR |
| 產品目錄頁面： | 826 (CN2011-ZH PDF) |
| 其它名稱： | 568-1056-5 568-3985-5 935269567112 PCA9555D |
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PCA9555_8
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 08 — 22 October 2009
15 of 34
NXP Semiconductors
PCA9555
16-bit I2C-bus and SMBus I/O port with interrupt
7.2 System conguration
A device generating a message is a ‘transmitter’; a device receiving is the ‘receiver’. The
device that controls the message is the ‘master’ and the devices which are controlled by
the master are the ‘slaves’ (see Figure 17).
7.3 Acknowledge
The number of data bytes transferred between the START and the STOP conditions from
transmitter to receiver is not limited. Each byte of eight bits is followed by one
acknowledge bit. The acknowledge bit is a HIGH level put on the bus by the transmitter,
whereas the master generates an extra acknowledge related clock pulse.
A slave receiver which is addressed must generate an acknowledge after the reception of
each byte. Also a master must generate an acknowledge after the reception of each byte
that has been clocked out of the slave transmitter. The device that acknowledges has to
pull down the SDA line during the acknowledge clock pulse, so that the SDA line is stable
LOW during the HIGH period of the acknowledge related clock pulse; set-up time and hold
time must be taken into account.
A master receiver must signal an end of data to the transmitter by not generating an
acknowledge on the last byte that has been clocked out of the slave. In this event, the
transmitter must leave the data line HIGH to enable the master to generate a STOP
condition.
Fig 17. System conguration
002aaa966
MASTER
TRANSMITTER/
RECEIVER
SLAVE
RECEIVER
SLAVE
TRANSMITTER/
RECEIVER
MASTER
TRANSMITTER
MASTER
TRANSMITTER/
RECEIVER
SDA
SCL
I2C-BUS
MULTIPLEXER
SLAVE
Fig 18. Acknowledgement on the I2C-bus
002aaa987
S
START
condition
9
8
2
1
clock pulse for
acknowledgement
not acknowledge
acknowledge
data output
by transmitter
data output
by receiver
SCL from master
相關PDF資料 |
PDF描述 |
|---|---|
| PCA9555DB,112 | IC I/O EXPANDER I2C 16B 24SSOP |
| PCA9555PW,112 | IC I/O EXPANDER I2C 16B 24TSSOP |
| 5-531478-4 | CONT.MINI-LEAF STRIP |
| 5-583857-5 | TWIN LEAF DUMMY CONTACT |
| 530505-8 | DUO-TYNE FLAG STRIP |
相關代理商/技術參數 |
參數描述 |
|---|---|
| PCA9555D112 | 制造商:NXP Semiconductors 功能描述:IC I/O EXPANDER 16BIT 400KHZ SOIC-24 |
| PCA9555D118 | 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述: |
| PCA9555DB | 功能描述:接口-I/O擴展器 Remote 16-Bit I2C & SMBus I/O Expander RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| PCA9555DB,112 | 功能描述:接口-I/O擴展器 I2C/SMBUS 16BIT GPIO RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| PCA9555DB,118 | 功能描述:接口-I/O擴展器 16-BIT I2C FM TP GPIO INT PU RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
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