SX1501I087TRT Semtech, SX1501I087TRT Datasheet - Page 20

• Manufacturer Part Number: SX1501I087TRT
• Description: IC GPIO EXPANDER I2C 4CH 20QFN
• Manufacturer: Semtech

Specifications of SX1501I087TRT

• Interface: I²C
• Number Of I /o: 4
• Interrupt Output: Yes
• Frequency - Clock: 400kHz
• Voltage - Supply: 1.2 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: SX1501I087TR

Addr
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
ADVANCED COMMUNICATIONS & SENSING
5
5.1
Rev 9 – 5
C
Name
RegData
RegDir
RegPullUp
RegPullDown
Reserved
RegInterruptMask
RegSenseHigh
RegSenseLow
RegInterruptSource
SX1501 4-channel GPIO
ONFIGURATION
*Bits set as output take “1” as default value.
th
Address
August 2010
0xAB
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x10
0x11
0x12
0x13
0x14
0x15
Name
RegData
RegDir
RegPullUp
RegPullDown
Reserved
RegInterruptMask
RegSenseHigh
RegSenseLow
RegInterruptSource
RegEventStatus
RegPLDMode
RegPLDTable0
RegPLDTable1
RegPLDTable2
RegPLDTable3
RegPLDTable4
RegAdvanced
R
EGISTERS
Default
0xXX
0xXX
0xFF
0xFF
0xFF
0x00
0x00
0x00
0x00
0x00
Table 12 – SX1501 Configuration Registers Overview
Bits
7:4
3:0
7:4
3:0
7:4
3:0
7:4
3:0
7:0
7:4
3:0
7:0
7:6
5:4
3:2
1:0
7:4
3:0
7:4
Description
Reserved. Must be set to 1 (default value)
Write: Data to be output to the output-configured IOs
Read: Data seen at the IOs, independent of the direction configured.
Reserved. Must be set to 1 (default value)
Configures direction for each IO.
0 : IO is configured as an output
1 : IO is configured as an input
Reserved. Must be set to 0 (default value)
Enables the pull-up for each IO
0 : Pull-up is disabled
1 : Pull-up is enabled
Reserved. Must be set to 0 (default value)
Enables the pull-down for each IO
0 : Pull-down is disabled
1 : Pull-down is enabled
Unused
Reserved. Must be set to 1 (default value)
Configures which [input-configured] IO will trigger an interrupt on NINT pin
0 : An event on this IO will trigger an interrupt
1 : An event on this IO will NOT trigger an interrupt
Unused
Edge sensitivity of I/O[3]
Edge sensitivity of I/O[2]
Edge sensitivity of I/O[1]
Edge sensitivity of I/O[0]
Reserved. Must be set to 0 (default value)
Interrupt source (from IOs set in RegInterruptMask)
0 : No interrupt has been triggered by this IO
1 : An interrupt has been triggered by this IO (an event as configured in relevant
RegSense register occured).
Writing '1' clears the bit in RegInterruptSource and in RegEventStatus.
When all bits are cleared, NINT signal goes back high.
Reserved. Must be set to 0 (default value)
Description
Data register
Direction register
Pull-up register
Pull-down register
Unused
Interrupt mask register
Unused
Sense register
Interrupt source register
Event status register
PLD mode register
PLD truth table 0
Unused
PLD truth table 2
Unused
Unused
Advanced settings register
20
4/8/16 Channel Low Voltage GPIO
SX1501/SX1502/SX1503
00 : None
01 : Rising
10 : Falling
11 : Both
XXXX XXXX
XXXX XXXX
XXXX XXXX
XXXX XXXX
XXXX XXXX
1111 1111
1111 1111
0000 0000
0000 0000
1111 1111
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
Default
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