Datasheet

CLASSIFICATION
PRODUCT SPECIFICATION
No.
DS-1740-2400-102
REV.
1.2
SUBJECT
CLASS 2 BLUETOOTH LOW ENERGY
SINGLE MODE MODULE
PAGE
13 of 34
CUSTOMER’S CODE
PAN1740
PANASONIC’S CODE
ENW89846A1KF
DATE
22.04.2014
PANASONIC INDUSTRIAL DEVICES EUROPE GMBH
www.pideu.panasonic.de
8.6 KEYBOARD CONTROLLER
The keyboard controller can be used for debouncing the incoming GPIO signals when
implementing a keyboard scanning engine. It generates an interrupt to the CPU
(KEYBR_IRQ). In parallel, five extra interrupt lines can be triggered by a state change on 32
selectable GPIOs (GPIOx_IRQ).
Features
 Monitors any of the 12 available GPIOs
 Generates a keyboard interrupt on key press or key release
 Implements debouncing time from 0 up to 63 ms
 Supports five separate interrupt generation lines from GPIO toggling
8.7 INPUT/OUTPUT PORTS
The PAN1740 has software-configurable I/O pin assignment, organized into ports Port 0,
Port1.
Features
 Port 0: 8 pins, Port 1: 6 pins (including SW_CLK and SWDIO)
 Fully programmable pin assignment
 Selectable Push-pull or open drain per pin
 Selectable 25KOhm pull-up, pull-down resistors per pin
 Pull-up voltage VBAT3V (BUCK mode)
 Fixed assignment for analog pin ADC[3:0]
 Pins retain their last state when system enters the Extended or Deep Sleep mode.
8.8 TIMERS
For any software related description please refer to the according Dialog document.
8.9 RESET
The PAN1740 comprises an RST pad which is active high. It contains an RC filter for spikes
suppression with 400 kΩ and 2.8 pF for the resistor and the capacitor respectively. It also
contains a 25 kΩ pulldown resistor. This pad should be connected to ground if not needed by
the application. The typical latency of the RST pad is in the range of 2 µs.