pca9575 NXP Semiconductors, pca9575 Datasheet - Page 18

• Manufacturer Part Number: pca9575
• Description: 16-bit I2c-bus And Smbus, Level Translating, Low Voltage Gpio With Reset And Interrupt
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCA9575_1
Product data sheet
7.6.15 Register 14 - Interrupt status port 0 register
7.6.16 Register 15 - Interrupt status port 1 register
7.7 Power-on reset
7.8 RESET input
This register is read-only. It is used to identify the source of interrupt.
Remark: If the interrupts are masked, this register will return all zeros.
Table 18.
Legend: * default value.
This register is read-only. It is used to identify the source of interrupt.
Remark: If the interrupts are masked, this register will return all zeros.
Table 19.
Legend: * default value.
When power is applied to V
a reset condition until V
and the PCA9575 registers and state machine will initialize to their default states. The
power-on reset typically completes the reset and enables the part by the time the power
supply is above V
supply, it is necessary to lower it below 0.2 V.
A reset can be accomplished by holding the RESET pin LOW for a minimum of t
PCA9575 registers and I
RESET input is once again HIGH.
Bit
7
6
5
4
3
2
1
0
Bit
7
6
5
4
3
2
1
0
Symbol
S0.7
S0.6
S0.5
S0.4
S0.3
S0.2
S0.1
S0.0
Symbol
S1.7
S1.6
S1.5
S1.4
S1.3
S1.2
S1.1
S1.0
Register 14 - Interrupt status port 0 register (address 0Eh) bit description
Register 15 - Interrupt status port 1 register (address 0Fh) bit description
POR
Access
read only
read only
read only
read only
read only
read only
read only
read only
Access
read only
read only
read only
read only
read only
read only
read only
read only
. However, when it is required to reset the part by lowering the power
Rev. 01 — 2 October 2008
DD
16-bit I
2
C-bus state machine will be held in their default state until the
has reached V
DD
, an internal Power-On Reset (POR) holds the PCA9575 in
2
Value
0*
0*
0*
0*
0*
0*
0*
0*
Value
0*
0*
0*
0*
0*
0*
0*
0*
C-bus and SMBus, level translating, low voltage GPIO
POR
Description
identifies source of interrupt
Description
identifies source of interrupt
. At that point, the reset condition is released
PCA9575
© NXP B.V. 2008. All rights reserved.
w(rst)
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. The