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參數(shù)資料
| 型號： | PCA9541 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 2-to-1 I2C master selector with interrupt logic and reset |
| 中文描述： | 2比1的I2C主機(jī)選擇與中斷邏輯和復(fù)位 |
| 文件頁數(shù)： | 9/30頁 |
| 文件大?。?/td> | 279K |
| 代理商： | PCA9541 |
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Philips Semiconductors
Product data sheet
PCA9541
2-to-1 I
2
C master selector with interrupt logic and reset
2004 Oct 01
9
Table 4.
MYBUS and NMYBUS Truth Table
NMYBUS
MYBUS
SLAVE CHANNEL
0
0
to the switching initiator
1
0
to the other channel
0
1
to the other channel
1
1
to the switching initiator
Table 5.
BUSON and NBUSON Truth Table
NBUSON
BUSON
SLAVE CHANNEL
0
0
OFF
1
0
ON
0
1
ON
1
1
OFF
NOTES:
1. Switch to the new channel is done when the master initiating the switch request sends a STOP command to the PCA9541.
2. If Master 0 wants to change the connection to the downstream channel in any way, it needs to write to
its Control Register (Reg#01), and
then send a STOP command
because an update of the connection to the downstream according to the values in the two internal Control
Registers happens only on a STOP command. Writing to one control register followed by a STOP condition on the other Master’s channel
will not cause an update to the downstream connection.
3. When both masters request a switch to their own channel at the same time, the master who last wrote to its control register before the
PCA9541 receives a STOP command wins the switching sequence. There is no arbitration performed.
4. Auto Increment feature (AI=1) allows to program the PCA9541 in 4 bytes:
–
Start
–
111A3A2A1A0 + 0
–
00010000
–
Data Reg#00
–
Data Reg#01
–
Stop
PCA9541 Address + Write
Select Reg#00 with AI = 1
Interrupt Enable Register Data
Control Register Data
Table 6.
Default Control Register Values
BIT
7
6
5
4
3
2
1
0
VERSION
SYMBOL
NTESTON
TESTON
NOT
USED
BUSINIT
NBUSON
BUSON
NMYBUS
MYBUS
PCA9541/01
MST_0
0
0
0
0
0
1
0
0
MST_1
0
0
0
0
1
0
1
0
PCA9541/02
MST_0
0
0
0
0
0
0
0
0
MST_1
0
0
0
0
0
0
1
0
PCA9541/03
MST_0
0
0
0
0
0
0
0
0
MST_1
0
0
0
0
0
0
1
0
PCA9541/02
(AFTER STOP)
MST_0
0
0
0
0
0
1
0
0
MST_1
0
0
0
0
1
0
1
0
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| PCA9541_08 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2-to-1 I2C-bus master selector with interrupt logic and reset |
| PCA9541_09 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2-to-1 I2C-bus master selector with interrupt logic and reset |
| PCA9541A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2-to-1 I2C-bus master selector with interrupt logic and reset |
| PCA9541ABS/01 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2-to-1 I2C-bus master selector with interrupt logic and reset |
| PCA9541ABS/01,118 | 功能描述:I2C 接口集成電路 2-to-1 I2C-bus master selector 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 |
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