PCA9541PW/03 데이터 시트보기 (PDF) - Philips Electronics
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PCA9541PW/03 Datasheet PDF : 30 Pages
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Philips Semiconductors
2-to-1 I2C master selector with interrupt logic and reset
Product data sheet
PCA9541
Register 0: Interrupt Enable (IE) Register (B1B0 = 00)
This register allows a master to read and/or write (if needed) Mask options for its own channel.
The Interrupt Enable Register described below is identical for both the masters. Nevertheless, there are physically 2 internal Interrupt Enable
Registers, one for each upstream channel.
When Master 0 reads/writes in this register, the internal Interrupt Enable Register 0 will be accessed.
When Master 1 reads/writes in this register, the internal Interrupt Enable Register 1 will be accessed.
BIT
7
6
5
4
3
2
1
0
SYMBOL
0
0
0
0
BUSLOSTMSK
BUSOKMSK
BUSINITMSK
INTINMSK
Table 2. Register 0
BIT
SYMBOL
0 INTINMSK
1 BUSINITMSK
2 BUSOKMSK
3 BUSLOSTMSK
4 NOT USED
5 NOT USED
6 NOT USED
7 NOT USED
READ/
WRITE
R/W
R/W
R/W
R/W
R only
R only
R only
R only
DEFAULT
DESCRIPTION
0: Interrupt on INT_IN will generate an interrupt on INT
0
1: Interrupt on INT_IN will not generate an interrupt on INT (masked)
0: After connection is requested and Bus Initialization requested (BUSINIT = 1), an
interrupt on INT will be generated when the bus initialization is done.
Note: Channel switching is done after bus initialization completed.
0
1: After connection is requested and Bus Initialization requested (BUSINIT = 1), an
interrupt on INT will not be generated when the bus initialization is done (masked).
Note: Channel switching is done after bus initialization completed.
0: After connection is requested and Bus Initialization not requested (BUSINIT = 0), an
interrupt on INT will be generated when a non-Idle situation has been detected on the
downstream slave channel by the bus sensor at the switching moment.
Note: Channel switching is done automatically after the STOP command.
0
1: After connection is requested and Bus Initialization not requested (BUSINIT = 0), an
interrupt on INT will not be generated when a non-Idle situation has been detected on
the downstream slave channel by the bus sensor at the switching moment (masked).
Note: Channel switching is done automatically after the STOP command.
0: An interrupt on INT will be generated after the other master has been been
disconnected
0
1: An interrupt on INT will not be generated after the other master has been been
disconnected.
0
0
0
0
NOTE:
Default values are the same for PCA9541/01, PCA9541/02, and PCA9541/03
2004 Oct 01
7
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