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STMPE2401 Datasheet(PDF) 3 Page - STMicroelectronics

Part No. STMPE2401
Description  24-bit Enhanced port expander with Keypad and PWM controller Xpander logic
Download  55 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STMPE2401 Datasheet(HTML) 3 Page - STMicroelectronics

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STMPE2401
Contents
3/55
6
I2C Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.1
Start condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.2
Stop condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.3
Acknowledge bit (ACK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.4
Data input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.5
Slave device address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.6
Memory addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.7
Operation modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7
System controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.1
Identification register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.2
System control register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.3
States of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8
Clocking system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8.1
Programming sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
9
Interrupt system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
9.1
Register map of interrupt system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
9.2
Interrupt control register (ICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
9.3
Interrupt enable mask register (IER) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
9.4
Interrupt status register (ISR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
9.5
Interrupt enable GPIO mask register (IEGPIOR) . . . . . . . . . . . . . . . . . . . 25
9.6
Interrupt status GPIO register (ISGPIOR) . . . . . . . . . . . . . . . . . . . . . . . . 26
9.7
Programming sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
10
GPIO controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
10.1
GPIO control registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
10.2
GPIO alternate function register (GPAFR) . . . . . . . . . . . . . . . . . . . . . . . . 30
10.3
Hot key feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
10.3.1
Programming sequence for hot key . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
10.3.2
Minimum pulse width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32


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