Update: 30 September, 2023
MAX7365 is an I2C-interfaced 8×7 key switch controller with GPIO ports. It provides microprocessors with management of up to 56 key switches. Keys codes generated for each keypress and release enable easier implementation of multiple key entries. Key inputs monitored statically, not dynamically, ensure low-EMI operation. The switches can be metallic or resistive (carbon) with up to 5kΩ of resistance. The device features autosleep and autowake to further minimize the power consumption of the device. The autosleep feature puts the device in a low-power state (1µA typical) after a programmable sleep timeout period. The autowake feature configures the device to return to normal operating mode from sleep upon a keypress. The key controller debounces and maintains a FIFO of key-press and release events (including autorepeat, if enabled). An interrupt (INT) output can be configured to alert key-presses either as they occur or at the maximum rate. Unused key switches can be used as GPI. In addition, there are five additional general-purpose input/output (GPIO) ports. GPOs can be programmed as push-pull or open-drain to high.
File format: PDF
Size: -
MD5 Checksum: EAB6EDAC9564D2E317EE2AB181DE90AC
Publication date: 08 May, 2012
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PDF Link: MAXIM MAX7365 handbook PDF