參數(shù)資料
型號： PCA9670PW,118
廠商： NXP Semiconductors
文件頁數(shù)： 34/35頁
文件大?。?/td> 0K
描述： IC I/O EXPANDER I2C 8B 16TSSOP
標(biāo)準(zhǔn)包裝： 2,500
接口： I²C
輸入/輸出數(shù)： 8
中斷輸出： 無
頻率 - 時鐘： 1MHz
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： 16-TSSOP（0.173"，4.40mm 寬）
供應(yīng)商設(shè)備封裝： 16-TSSOP
包裝： 帶卷 (TR)
包括： POR
其它名稱： 935282716118
PCA9670PW-T
PCA9670PW-T-ND
PCA9670
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 3 — 30 May 2013
8 of 35
NXP Semiconductors
PCA9670
Remote 8-bit I/O expander for Fm+ I2C-bus with reset
7.2 Software Reset Call, and device ID addresses
Two other different addresses can be sent to the PCA9670.
General Call address: allows resetting the PCA9670 through the I2C-bus upon
reception of the right I2C-bus sequence. See Section 7.2.1 “Software Reset” for more
information.
Device ID address: allows reading ID information from the device (manufacturer, part
identification, revision). See Section 7.2.2 “Device ID (PCA9670 ID field)” for more
information.
7.2.1 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 specific 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 defined 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 PCA9670 device(s) acknowledge(s) after seeing the General Call address
‘0000 0000’ (00h) only. If the R/W bit is set to 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.
a. The PCA9670 acknowledges this value only. If the byte is not equal to 06h, the
PCA9670 does not acknowledge it.
If more than 1 byte of data is sent, the PCA9670 does not acknowledge any more.
5. Once the right byte has been sent and correctly acknowledged, the master sends a
STOP command to end the Software Reset sequence: the PCA9670 then resets to
the default value (power-up value) and is ready to be addressed again within the
specified bus free time. If the master sends a Repeated START instead, no reset is
performed.
Fig 7.
General Call address
Fig 8.
Device ID address
0
002aac115
0
R/W
002aac116
1
0
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PCA9670PW-T 功能描述:接口-I/O擴展器 8-BIT I2C FM+ QB GPIO INT PU RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)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(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel
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