User's Manual l TQMa335xL UM 0101 l © 2019, TQ-Systems GmbH
Page 22
3.2.4.21
Clockout
The AM335x provides two Clockout signals, which are routed to the TQMa335xL pads.
The following table shows the signals used for Clockout.
Table 32:
Clockout signals
TQMa335xL pad
Signal
Pad
Dir.
AM335x ball
D17
Clkout1
XDMA_EVENT_INTR0
I/O
A15
D15
TCLKIN / Clkout2
XDMA_EVENT_INTR1
I/O
D14
3.2.5
Reset
The TQMa335xL provides Reset inputs, and Reset outputs at the TQMa335xL pads.
The following block diagram shows the reset signals.
&
PWRON
LGA pads
PMIC_PWRON
PWRONRST_IN#
PWRONRST_OUT#
WARMRST#
10
k
Ω
NRESPWRON
PMIC
AM335x
10
k
Ω
Supervisor
PWRONRST#
WARMRST#
VCC3V3
Illustration 9:
Block diagram Reset
The following table describes the reset signals, which are routed to the TQMa335xL pads.
Table 33:
Reset signals
TQMa335xL pad
Signal name
Dir.
Remark
D2
PWRONRST_IN#
I
OD
•
Reset input PWRONRST (Power-On Reset) of the AM335x
•
Generates Cold-Reset at the AM335x
•
Connect to open-drain output only!
•
Low-active signal
E2
PWRONRST_OUT#
O
•
Reset output RESETBMCU of the PMIC
•
Can be used to reset external periphery
•
Open drain, requires Pull-Up on carrier board (max. 3.3 V)
•
Low-active signal
D7
WARMRST#
O
PU
•
Warm-Reset# of the AM335x
•
10 kΩ PU to 3.3 V on the TQMa335xL
•
Low-active signal
The reset output of the supervisor used on the TQMa335xL can be connected to the POR_B input of the AM335x as a placement
option.
