N1_Hardware_User_Guide
Copyright © Neoway Technology Co., Ltd
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6.4.2 I2C
N1provides one I2C interface, which supports the host mode only. The I2C interface is open-drain driven
(pull-up resistor is mandatory for the external circuit). It supports a maximum rate of 3.4 Mbps and a
reference high level of 1.8 V. It is recommended to connect the interface to BREG_L6_1P8.. Figure 6-6
shows the reference design of the I2C interface.
Figure 6-6
Reference design of I2C
2.2K
2.2K
1.8V
I2C-SCL
I2C-SDA
I2C-SCL
I2C-SDA
6.4.3 SPI
N1provides one SPI interface, which supports only the host mode. The maximum rate is 52MHz, and the
reference level is 1.8V. Figure 6-7 shows the reference design of SPI interfaces.
Figure 6-7
Reference design of the SPI
SCLK
SS
MISO
N1
MOSI
GND
Master
SCLK
SS
MISO
MOSI
GND
Slave
TXS0104E or NLSX4373MUTAG is recommended if a level shifter is required for the UART, I2C, SPI,
etc. Do not connect interfaces of different voltage level standards directly. Otherwise, the module might
get damaged.
6.5 ADC
N1provides two ADC channels. ADC pins support highest precision of 10bit. Table 6-3 lists the ADC
pins.
