P9415-R-EVK Evaluation Kit
R16UH0015EU0100 Rev.1.0
May 27, 2021
Page 16
Table 4. Transient Voltage Suppressors (TVS) Recommendations
V
MLDO
= 12V
D24V0L1B2LP
VRWM = 24V maximum
VBR = 26V minimum at 1mA
VCL = 42V maximum at 1A pp
11. GPIO and GPOD Pins
The P9415-R has general-purpose input-output (GPIO) pins. The OD0-OD4 and GP0-GP6 pins are all multi-
functional.OD0-OD4 pins have an open-drained structure and GP0-GP6 pins have a push-pull structure.
11.1 OD0/SCL Pin
The OD0 pin has a digital function open-drain structure. It is assigned to SCL of the I2C function for the serial
interface between the AP and the P9415-R. An external pull-up register on the SCL line is required for I2C
communication and 1.8V power is pulled up in P9415-R demo board. OD0 can operate up to 5V.
11.2 OD1/SDA Pin
The OD1 pin is set as a digital function open-drain structure. It is assigned to the SDA function of the I2C serial
interface bus between the AP and the P9415-R. An external pull-up resistor on the SDA line is required for I2C
communication and 1.8V power is pulled up in P9415-R demo board. OD1 can operate up to 5V.
11.3 OD2/INT Pin
The OD2 pin is set as a digital function open-drain structure. It is assigned as the /INT signal for interrupt
notification to the AP. /INT pin indicates a major change of states or error modes such as over-current, over-
voltage, or over-temperature event. Connect this pin to the AP I/O voltage rail using an external pull-up resistor.
The P9415-R drives this pin LOW to notify the AP of status changes.
11.4 OD3/ALIGN_X Pin and OD4/ALIGN_Y Pin
The XY alignment feature allows the P9415-R to sense its relative position to the Tx coil magnetic field center.
When used, the XY alignment coils should be connected to pins OD3(X-alignment coil input) and 0D4 (Y-
alignment coil input). These signals are internally rectified, filtered, and sensed through the ADC. The ADC
values that represent Align X coil signal strength and Align Y coil signal strength can be read in 0x38 and 0x39
registers respectively.
Figure 17. Typical XY Align Coil Schematic Level Connection Guide
AlignY PCB coil
C
23
8
NP
ALGX_OD3
R
54
NP
10V/0402
1/16W/0402
C
23
9
NP
1/16W/0402
1/16W/0402
LDO1P8
R
53
NP
LDO1P8
D8
1
.8
V
R51 10k
ALGY
OPTIONAL : XY Alignment
1/16W/0402
ALGY _OD4
R286
NP
D9
1
.8
V
R287
NP
10V/0402
1/16W/0402
R52 10k
AlignX PCB coil
ALGX
R280 0
