參數(shù)資料
型號(hào)： PCA9554ADBRG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 微控制器/微處理器
英文描述： 8 I/O, PIA-GENERAL PURPOSE, PDSO16
封裝： GREEN, PLASTIC, SSOP-16
文件頁數(shù)： 2/39頁
文件大?。?/td> 985K
代理商： PCA9554ADBRG4
Reads
A2
0
1
S
1
A1 A0 0
A
Data From Register
Slave Address
R/W
ACK From
Slave
Command Byte
ACK From
Slave
S
A2
0
1
A1 A0
R/W
1 A
Data
A
ACK From
Master
Data
Data From Register
NACK From
Master
NA P
Last Byte
ACK From
Slave
SCL
SDA
INT
Start
Condition
R/W
Read From
Port
Data Into
Port
Stop
Condition
ACK From
Master
NACK From
Master
ACK From
Slave
Data From Port
Slave Address
Data From Port
1
9
8
7
6
5
4
3
2
A2
0
1
S
1
A1 A0 1
A
Data 1
Data 4
A
NA P
Data 2
Data 3
Data 4
tiv
tph
tps
tir
Data 5
SCPS127D – SEPTEMBER 2006 – REVISED AUGUST 2008........................................................................................................................................... www.ti.com
The bus master first must send the PCA9554A address with the least significant bit (LSB) set to a logic 0 (see
Figure 4 for device address). The command byte is sent after the address and determines which register is
accessed. After a restart, the device address is sent again, but this time the LSB is set to a logic 1. Data from the
register defined by the command byte then is sent by the PCA9554A (see Figure 8 and Figure 9). After a restart,
the value of the register defined by the command byte matches the register being accessed when the restart
occurred. Data is clocked into the register on the rising edge of the ACK clock pulse. There is no limitation on the
number of data bytes received in one read transmission, but when the final byte is received, the bus master must
not acknowledge the data.
Figure 8. Read From Register
<br/>
A.
This figure assumes the command byte has previously been programmed with 00h.
B.
Transfer of data can be stopped at any moment by a Stop condition.
C.
This figure eliminates the command byte transfer, a restart, and slave address call between the initial slave address
call and actual data transfer from the P port. See Figure 8 for these details.
Figure 9. Read From Input Port Register
10
Copyright 2006–2008, Texas Instruments Incorporated
Product Folder Link(s): PCA9554A
相關(guān)PDF資料
PDF描述
PCB1A24S 24 CONTACT(S), FEMALE, STRAIGHT SINGLE PART CARD EDGE CONN, SCREW
PCD25F98S0T20 25 CONTACT(S), FEMALE, D SUBMINIATURE CONNECTOR, PRESS FIT
PCFMB150E6 150 A, 600 V, N-CHANNEL IGBT
PCH-27-823 1 ELEMENT, 82 uH, GENERAL PURPOSE INDUCTOR
PCH-27-124 NOT RoHS. Power inductor, 10% tol (add &apos;L&apos; for compliant version)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCA9554ADGV 制造商:TI 制造商全稱:Texas Instruments 功能描述:REMOTE 8-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS
PCA9554ADGVR 功能描述:接口-I/O擴(kuò)展器 Rem 8B I2C & SMBus I/O Expander 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
PCA9554ADGVRG4 功能描述:接口-I/O擴(kuò)展器 Rem 8B I2C and SMBus I/O Expander 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
PCA9554ADW 功能描述:接口-I/O擴(kuò)展器 Rem 8B I2C & SMBus I/O Expander 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
PCA9554ADWG4 功能描述:接口-I/O擴(kuò)展器 Rem 8B I2C and SMBus I/O Expander 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

*
*
*