NXP Semiconductors
UM10858
PN7462 family HW user manual
UM10858
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User manual
COMPANY PUBLIC
Rev. 1.4 — 14 May 2018
314514
266 of 345
Table 311. Interface selection
HIF_Selection
Host interface type
000
no interface selected
001
I2C
100
SPI
011
HSU
100
USB
The Host Interface selection is done by FW/Application program by writing into register in
PCR --> PCR_SYS_REG bits [2:0]. It’s the responsibility of application developer to
correctly select the Host Interface.
14.3.1 I2C Slave interface
The host interface of PN7462 family can be also used as I2C slave interface. This is the
second of the two I2C controllers supported by PN7462 family. For more details on the
I2C master controller please refer to
Section 14.1
. The I2C interface is compliant with the
I2C Bus Specification V3.0.
14.3.1.1 I2C Slave features
•
Supports slave I2C bus
•
Standard mode, Fast mode (extended to 1Mbds) and High-speed mode
•
Supports 7-bit addressing mode only
•
Selection of I2C address done by 2 pins
−
Support multiple addresses
−
The upper bits of address are hard coded; The value (01010XXb) corresponds to
NXP identifier for I2C blocks
•
General call (Software reset only)
•
Software reset (in Standard and Fast mode only)
14.3.1.2 Pin description
Table 312. I²C pinning and signal assignments
Pin Number
Pin Name
I²C slave
6
ATX_A
SCL
7
ATX_B
SDA
8
ATX_C
Adress0
9
ATX_D
Adress1
