REL 1.2
Page 26 of 82
i.MX6 Qseven PMIC SOM Hardware User Guide
iWave Systems Technologies Pvt. Ltd.
2.7.17
PWM Interface
i.MX6 Qseven PMIC SOM supports one PWM interface on Qseven Edge connector. i.MX6 CPU’s PWM2 module is
used for PWM interface which has a 16-bit counter and optimized to generate sound from stored sample audio
images and it can also generate tones. This is primarily used for controlling the LVDS backlight brightness. When not
in use for this primary purpose, it can be used as General Purpose PWM output.
For more details, refer Qseven Edge connector pin 123 on
2.7.18
WDOG Interface
i.MX6 Qseven PMIC SOM supports Watchdog trigger and Watchdog event indicator (in hardware) on Qseven Edge
connector. i.MX6 CPU’s WDOG1 module is used for Watchdog event indicator which is inverted and connected to
Qseven since i.MX6 CPU provides active low output. Watchdog trigger input from Qseven Edge connector is
connected to i.MX6 CPU’s GPIO (GPIO6_8).
For more details, refer Qseven Edge connector pins 70 & 72 on
2.7.19
I2C Interface
i.MX6 Qseven PMIC SOM supports two I2C interface on Qseven Edge connector. i.MX6 CPU’s I2C1 & I2C2.channels
are used for General purpose I2C interface which is compatible with the standard NXP I2C bus protocol. It supports
standard mode with data transfer rates up to 100kbps and Fast mode with data transfer rates up to 400kbps.
i.MX6 CPU’s I2C1 is connected to General Purpose I2C bus0 of Qseven Edge connector. Since flexible I2C standard
allows multiple devices to be connected to the single bus, i.MX6 CPU’s I2C1 is also connected to LVDS Display ID DDC
and SSC port. i.MX6 CPU’s I2C2 is connected to HDMI DDC of Qseven Edge connector for HDMI EDID read. Also it is
connected to General Purpose I2C bus1 of Qseven Edge connector.
For more details, refer Qseven Edge connector pins 60,62,66,68,125,126,127,128,150 & 152 on
Note: I2C2 is also shared with On-SOM PMIC & optional RTC controller with address 0x08 and 0x68 correspondingly.
2.7.20
Manufacturing/Debug UART Interface (UART2)
As per Qseven Specification version 2.0, manufacturing signals on Qseven Edge connector can be assigned by vendor
and it can be connected to interfaces like UART or JTAG. i.MX6 Qseven PMIC SOM supports one Debug UART
interface on these pins in Qseven Edge connector. i.MX6 CPU’s UART2 controller is used for Debug UART interface.
As per Qseven Specification version 2.0, to select UART as debug interface, MFG_NC4 pin should be made low in
carrier board even though it is not must for i.MX6 Qseven PMIC SOM.
For more details, refer Qseven Edge connector pins 204,208 & 209 on