參數(shù)資料
型號(hào)： PCA9502
廠商： NXP Semiconductors N.V.
英文描述： 8-bit I/O expander with I2C-bus/SPI interface
中文描述： 8位I / O擴(kuò)展接口與I2C-bus/SPI
文件頁(yè)數(shù)： 11/25頁(yè)
文件大?。?/td> 125K
代理商： PCA9502
PCA9502_3
NXP B.V. 2006. All rights reserved.
Product data sheet
Rev. 03 — 13 October 2006
11 of 25
NXP Semiconductors
PCA9502
8-bit I/O expander with I
2
C-bus/SPI interface
9.3 Addressing
Before any data is transmitted or received, the master must send the address of the
receiver via the SDA line. The first byte after the START condition carries the address of
the slave device and the read/write bit.
Table 11
shows how the PCA9502’s address can
be selected by using A1 and A0 pins. For example, if these 2 pins are connected to V
DD
,
then the PCA9502’s address is set to 0x90, and the master communicates with it through
this address.
[1]
X = logic 0 for write cycle; X = logic 1 for read cycle.
9.4 Use of sub-addresses
When a master communicates with the PCA9502 it must send a sub-address in the byte
following the slave address byte. This sub-address is the internal address of the word the
master wants to access for a single byte transfer, or the beginning of a sequence of
locations for a multi-byte transfer. A sub-address is an 8-bit byte. Unlike the device
address, it does not contain a direction (R/W) bit, and like any byte transferred on the bus
it must be followed by an acknowledge.
A register write cycle is shown in
Figure 10
. The START is followed by a slave address
byte with the direction bit set to ‘write’, a sub-address byte, a number of data bytes, and a
STOP signal. The sub-address indicates which register the master wants to access. and
the data bytes which follow will be written one after the other to the sub-address location.
Table 11.
A1
V
DD
V
DD
V
DD
V
DD
V
SS
V
SS
V
SS
V
SS
SCL
SCL
SCL
SCL
SDA
SDA
SDA
SDA
PCA9502 address map
A0
V
DD
V
SS
SCL
SDA
V
DD
V
SS
SCL
SDA
V
DD
V
SS
SCL
SDA
V
DD
V
SS
SCL
SDA
PCA9502 I
2
C-bus addresses (hex)
[1]
0x90 (1001 000X)
0x92 (1001 001X)
0x94 (1001 010X)
0x96 (1001 011X)
0x98 (1001 100X)
0x9A (1001 101X)
0x9C (1001 110X)
0x9E (1001 111X)
0xA0 (1010 000X)
0xA2 (1010 001X)
0xA4 (1010 010X)
0xA6 (1010 011X)
0xA8 (1010 100X)
0xAA (1010 101X)
0xAC (1010 110X)
0xAE (1010 111X)
相關(guān)PDF資料
PDF描述
PCA9506 40-bit I2C-bus I/O port with RESET, OE, and INT
PCA9509 Level translating I2C-bus/SMBus repeater
PCA9510A Hot swappable I2C-bus and SMBus bus buffer
PCA9511A Hot swappable I2C-bus and SMBus bus buffer
PCA9511DP Hot swappable I2C and SMBus bus buffer
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCA9502BS 功能描述:接口-I/O擴(kuò)展器 8-BITI/O EXPDR W/I2C-SPI INTRF 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
PCA9502BS,128 功能描述:接口-I/O擴(kuò)展器 8-BITI/O EXPDR 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
PCA9502BS,151 功能描述:接口-I/O擴(kuò)展器 I/O EXPANDER I2C 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
PCA9502BS,157 功能描述:接口-I/O擴(kuò)展器 8-BITI/O EXPDR 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
PCA9502BS-F 功能描述:接口-I/O擴(kuò)展器 8-BITI/O EXPDR W/I2C-SPI INTRF 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
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*