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參數(shù)資料
| 型號： | PCA9575HF,118 |
| 廠商： | NXP Semiconductors |
| 文件頁數(shù)： | 11/38頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC I/O EXPANDER I2C 16B 24HWQFN |
| 產(chǎn)品培訓(xùn)模塊： | I²C Bus Fundamentals |
| 特色產(chǎn)品： | NXP - I2C Interface |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 接口： | I²C，SM 總線 |
| 輸入/輸出數(shù)： | 16 |
| 中斷輸出： | 是 |
| 頻率 - 時鐘： | 400kHz |
| 電源電壓： | 1.1 V ~ 3.6 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 24-HWQFN（4x4） |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 包括： | POR |
| 產(chǎn)品目錄頁面： | 826 (CN2011-ZH PDF) |
| 其它名稱： | 568-4771-6 |
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PCA9575_3
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 03 — 9 November 2009
19 of 38
NXP Semiconductors
PCA9575
16-bit I2C-bus and SMBus, level translating, low voltage GPIO
7.9 Software reset
The Software Reset Call allows all the devices in the I2C-bus to be reset to the power-up
state value through a specic formatted I2C-bus command. To be performed correctly, it
implies that the I2C-bus is functional and that there is no device hanging the bus.
The Software Reset sequence is dened as following:
1. A START command is sent by the I2C-bus master.
2. The reserved General Call I2C-bus address ‘0000 000’ with the R/W bit set to 0 (write)
is sent by the I2C-bus master.
3. The PCA9575 device(s) acknowledge(s) after seeing the General Call address
‘0000 0000’ (00h) only. If the R/W bit is set to logic 1 (read), no acknowledge is
returned to the I2C-bus master.
4. Once the General Call address has been sent and acknowledged, the master sends
1 byte. The value of the byte must be equal to 06h (1000 0011).The PCA9575
acknowledges this value only. If the byte is not equal to 06h, the PCA9575 does not
acknowledge it. If more than 1 byte of data is sent, the PCA9575 does not
acknowledge anymore.
5. Once the right byte has been sent and correctly acknowledged, the master sends a
STOP command to end the Software Reset sequence: the PCA9575 then resets to
the default value (power-up value) and is ready to be addressed again within the
specied bus free time. If the master sends a Repeated START instead, no reset is
performed. The I2C-bus master must interpret a non-acknowledge from the PCA9575
(at any time) as a ‘Software Reset Abort’. The PCA9575 does not initiate a software
reset.
7.10 Interrupt output (INT)
The open-drain active LOW interrupt is activated when one of the port pins changes state
and the port pin is congured as an input and the interrupt on it is not masked. The
interrupt is deactivated when the port pin input returns to its previous state or the Input
Port register is read. It is highly recommended to program the MSK register, and the CFG
registers during the initialization sequence after power-up, since any change to them
during Normal mode operation may cause undesirable interrupt events to happen.
Remark: Changing an I/O from an output to an input may cause a false interrupt to occur
if the state of the pin does not match the contents of the Input Port register. Only a Read of
the Input Port register that contains the bit(s) image of the input(s) that generated the
interrupt clears the interrupt condition.
7.11 Standby
The PCA9575 goes into standby when the I2C-bus is idle. Standby supply current is lower
than 2.0
A (typical).
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCA9575PW1,118 | 功能描述:I2C 接口集成電路 I2C Bus/ SMBus Level Translating 24-Pin RoHS:否 制造商:NXP Semiconductors 電源電壓-最大:5.5 V 電源電壓-最小:2.3 V 最大工作頻率:400 KHz 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-16 |
| PCA9575PW2,118 | 功能描述:I2C 接口集成電路 I2C Bus/ SMBus Level Translating 28-Pin RoHS:否 制造商:NXP Semiconductors 電源電壓-最大:5.5 V 電源電壓-最小:2.3 V 最大工作頻率:400 KHz 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-16 |
| PCA9575PW2118 | 制造商:Rochester Electronics LLC 功能描述: 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述: |
| PCA9600D | 功能描述:緩沖器和線路驅(qū)動器 FM+ BUS BUFFER RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| PCA9600D,112 | 功能描述:緩沖器和線路驅(qū)動器 FM+ BUS BUFFER RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
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