User's Manual l TQMa6x & TQMa6xP UM 0403 l © 2019, TQ-Systems GmbH
Page 30
3.2.5.25
Watchdog
The i.MX6 provides a watchdog timer.
The following table shows the signal used by the watchdog timer.
Table 46:
Signal WDOG
Signal name
Direction
i.MX6 ball
TQMa6x
WDOG1#
O
E19
X2–60
The watchdog of the i.MX6 has two functions:
•
Power-down counter
After the i.MX6 is reset, a power-down counter is automatically started. If this is not deactivated within 16 seconds,
signal WDOG1# becomes active. More information is to be taken from the NXP Reference Manuals (4), (5), and (6).
•
Watchdog timer
If the watchdog timer is activated and is not reset within the configured time, signal WDOG1# is activated.
At the same time, the i.MX6 System Reset Controller triggers a warm reset.
Signal WDOG1# remains at low level or Hi-Z until the next power-on reset.
More information is to be taken from the NXP Reference Manuals (4), (5), and (6).
Optionally, the watchdog can be used as a reset source for the SPI-NOR flash.
3.2.5.26
XTAL
The i.MX6 provides two differential clock outputs, which are routed to the connectors.
The following table shows the signals used.
Table 47:
Signals XTAL
Signal name
Direction
i.MX6 ball
TQMa6x
CLK2_P
O
D5
X3–35
CLK2_N
O
C5
X3–33
CLK1_P
O
D7
X1–28
CLK1_N
O
C7
X1–26
