N40P112 austriamicrosystems, N40P112 Datasheet - Page 9

• Manufacturer Part Number: N40P112
• Description: SW NAV JOYSTICK MOD CONTACTLESS
• Manufacturer: austriamicrosystems
• Series: EasyPoint™r
• Type: Navigation Switch, PCB Mountr

Specifications of N40P112

• Output: Contactless Magnetic Switch
• Switch Function: 2 Axis with Select
• Actuator Type: Joystick
• Termination Style: SMD (SMT) Tab
• Operating Force: 35/180gf
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Contact Rating @ Voltage: -

EasyPoint
Datasheet - U s i n g t h e N 4 0 P 11 2 M o d u l e
8 Using the N40P112 Module
8.1 Powering up the Module
The N40P112 module has a Power ON Reset (POR) cell to monitor the VDD voltage at startup and reset all the internal registers. After the
internal reset is completed, the POR cell is disabled in order to save current during normal operation.
If VDD drops below 2.7V down to 0.2V, the POR cell will not be enabled back, and the registers will not be correctly reseted or can get random
values.
Note: It is highly recommended to control the external RESETn signal by applying a LOW pulse of >100ns once VDD has reached 2.7V and
Figure 5. Power-up Sequence
8.2 Registers Initialization
After Power Up, the following sequence must be performed:
www.austriamicrosystems.com/N40P112
RESETn
1. VDD and VDDp Power up, and reached their nominal values (VDD>2.7V, VDDp>1.7V).
2. Initialization:
3. Perform an Offset Calibration (X and Y coordinate compensation for zero position)
4. Configure the Dead Zone Area for Wake-up function (if needed)
5. Configure the wanted Power Mode and INT function into register [0Fh] (Idle mode / Low Power Mode with Timebase configuration, INT
6. X Y coordinates are ready to be read.
VDD
VDDp reached 1.7V.
for Wake-up or Coordinates ready)
a. RESETn pulse LOW during >100ns, then RESETn HIGH
b. Loop check register [0Fh] until the value F0h or F1h is present (reset finished, registers to default values)
c. Write value 0Dh into register [2Dh] → Configure T_ctrl scaling factor for 1.0mm knob displacement
TM
(>1.7V)
VDDp
2.7V
0V
External RESETn pin, and without Power on Reset (POR)
N40P112
0
VDD @ t=0 between
Power up phase
0V and 2.7V
>100ns
>1000us
Revision 1.1
VDD
2.7V
0.2V
0V
VDD @ t=0 between
Power up phase
0V and 0.2V
Power on Reset (POR) only
>1000us
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