Description
The FMA1127 is a low-power, compact, flexible touch sensor controller that converts capacitance generated between the human body and a conductive touch pad to digital data without any analog signal processing. It includes touch sensor technology that compares reference and sensor input impedances to detect touch, all in digital domain.
Its programmability increases design flexibility and gives better performance and stability for a broad range of applications. The FMA1127’s Automatic Impedance Calibration (AIC™) function can be easily configured to support different sensitivities for individual channels independently as well as to change values of parameters such as calibration intervals. AIC may also be temporarily paused and resumed by a host MCU.

FEATUREs
• Patented full-digital architecture
• Supports 12 input channels (40QFN and 30SSOP) or 9 input
   channels (32QFN and 24SSOP) or 6 input channels
   (24QFN and 20SSOP)
• Programmable registers to characterize applications
• I2C interface with the host MCU
• Configurable Automatic Impedance Calibration (AIC™ )
• Two types of interrupts (GINT for general purpose and
   TINT for touch detection)
• 8-bit resolution of touch strength data (256 steps)
• Three different modes for Adjacent Pattern Interference
   Suppression (APIS™)
• Configurable DIO pins as direct touch outputs, extended
   GPIOs, or external interrupt inputs.
• Beep generation for tactile feeling
• Idle and Sleep modes for power saving
• De-bounced touch outputs

APPLICATIONs
• Portable devices such as PDAs, cellular phones, MP3 players,
   remote controllers, and other integrated input
• Home appliances and consumer electronic products
• Computer input devices such as mice and keyboards