STMPE801QTR STMicroelectronics, STMPE801QTR Datasheet - Page 17

• Manufacturer Part Number: STMPE801QTR
• Description: IC I/O EXPANDER I2C 8B 16QFN
• Manufacturer: STMicroelectronics

Specifications of STMPE801QTR

• Interface: I²C
• Number Of I /o: 8
• Interrupt Output: Yes
• Frequency - Clock: 400kHz
• Voltage - Supply: 1.65 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-QFN
• Includes: POR
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6132-2

STMPE801
8.2
8.3
Interrupt status GPIO register (ISGPIOR)
ISGPIOR register monitors the status of the interruption from a particular GPIO pin interrupt
source to the host. Regardless whether the IEGPIOR bits are enabled or not, the ISGPIOR
bits are still updated. The ISG[9:0] bits are the interrupt status bits correspond to the
GPIO[7:0] pins.
Table 14. Register
GPIO controller
A total of 8 GPIOs are available in the STMPE801 port expander IC. The GPIO controller
contains the registers that allow the host system to configure each of the pins as input or
output. Unused GPIOs should be configured as outputs to minimize the power consumption.
A group of registers are used to control the exact function of each of the 8 GPIO. The
registers and their respective address is listed in the following table.
Table 15. Register
Reset
Value
R/W
Bit
Address
Bits
7:0
0x10
0x11
0x12
ISG7
RW
7
0
ISG[x]
Name
Register Name
GPMR
ISG6
GPSR
GPDR
RW
6
0
Interrupt Status GPIO (where x = 7 to 0)
Read:
Interrupt Status of the GPIO[x]. Reading the register will clear any bits that
has been set to ‘1’
Write:
Writing to this register has no effects
ISG5
RW
5
0
GPIO monitor pin state register
GPIO set pin state register
GPIO set pin direction register
ISG4
RW
Description
4
0
ISGPIOR
ISG3
RW
Description
3
0
Interrupt, power supply & reset
ISG2
RW
2
0
(during sequential R/W)
Auto-Increment
ISG1
RW
1
0
Yes
Yes
Yes
ISG0
RW
0
0
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