STMPE1801BJR STMicroelectronics, STMPE1801BJR Datasheet - Page 33

• Manufacturer Part Number: STMPE1801BJR
• Description: Touch Screen Converters & Controllers Xpander Logic 18-Bit 18 GPIO 1.65 to 3.6V
• Manufacturer: STMicroelectronics

Specifications of STMPE1801BJR

• Rohs: yes
• Input Type: 1 Keypad
• Data Rate: 400 kbps
• Resolution: 18 bit
• Interface Type: I2C
• Supply Voltage: 1.65 V to 3.6 V
• Supply Current: 28 uA
• Operating Temperature: - 40 C to + 85 C
• Package / Case: CSP-25
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 1.65 V

STMPE1801
10.1
10.1.1
GPIO_PULL_UP_yyy
GPIO_SET_DIR_yyy
GPIO_xxx_HIGH
GPIO_xxx_LOW
GPIO_SET_yyy
GPIO_CLR_yyy
Register name
GPIO_xxx_MID
GPIO_MP_yyy
GPIO_RE_yyy
GPIO_FE_yyy
GPIO control registers
A group of registers is used to control the exact function of each of the 18 GPIOs.
All the GPIO registers are named as GPIO_xxx_yyy, where:
Bit description
The function of each bit is shown in the following table:
–
–
–
–
–
xxx represents the functional group
yyy represents the byte position of the GPIO (LOW/MID/HIGH)
LOW registers control GPIO[7:0]
MID registers control GPIO[8:15]
HIGH registers control GPIO[17:16]
IO-15
IO-7
GPIO monitor pin state
GPIO set pin state
GPIO clear pin state
GPIO set pin direction
GPIO rising edge
GPIO falling edge
GPIO pull up
7
Description
IO-14
IO-6
6
Doc ID 17884 Rev 3
IO-13
IO-5
5
RESERVED
Reading this bit yields the current state of the bit. Writing
has no effect.
Writing ‘1’ to this bit causes the corresponding GPIO to go
to ‘1’ state. Writing ‘0’ has no effect.
Writing ‘1’ to this bit causes the corresponding GPIO to go
to ‘0’ state. Writing ‘0’ has no effect.
‘0’ sets the corresponding GPIO to input state, and ‘1’ sets
it to output state.
Set to ‘1’ enable rising edge detection on the
corresponding GPIO.
Set to ‘1’ enable falling edge detection on the
corresponding GPIO.
Set to ‘1’ enable internal pull-up resistor.
IO-12
IO-4
4
IO-11
IO-3
3
IO-10
IO-2
Function
2
IO-16
IO-9
IO-1
1
GPIO controller
IO-17
IO-8
IO-0
0
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