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CAT9954HV4I-G-T2 Datasheet(PDF) 7 Page - Catalyst Semiconductor

No. de pieza CAT9954HV4I-G-T2
Descripción Electrónicos  8-bit I2C and SMBus I/O Port with Interrupt
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Fabricante Electrónico  CATALYST [Catalyst Semiconductor]
Página de inicio  http://www.catalyst-semiconductor.com
Logo CATALYST - Catalyst Semiconductor

CAT9954HV4I-G-T2 Datasheet(HTML) 7 Page - Catalyst Semiconductor

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CAT9554, CAT9554A
7
Doc. No. 25088, Rev. B
© 2006 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
INT: Interrupt Output
The open-drain interrupt output is activated when one of
the port pins configured as an input changes state
(differs from the corresponding input port register bit
state). The interrupt is deactivated when the input returns
to its previous state or the input port register is read.
Changing an I/O from an output to an input may cause
a false interrupt if the state of the pin does not match the
contents of the input port register.
Figure 4. Simplified Schematic of I/O0 to I/O7
Output Port
Register Data
VCC
I/O0 to I/O7
VSS
Input Port
Register Data
To
INT
Polarity
Register Data
Polarity
Inversion Register
Write
Polarity
Register
Data from
Shift Register
Read Pulse
Write Pulse
Write
Configuration Pulse
Data from
Shift Register
Data from
Shift Register
Configuration
Register
D
Q
CK
Q
FF
D
Q
CK
Q
FF
DQ
CK
Q
LATCH
DQ
CK
Q
FF
Q1
Q2
Output Port
Register
Input Port
Register


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