Power
Management
©
PHYTEC Messtechnik GmbH 2010 L-750e_1
31
5
Power Management
The phyCARD-M was designed to support applications requiring a
power management. Three pins of the X-Arc bus are designated for
this purpose. nPower_off and nSuspend_to_RAM are output pins
which can be used to indicate the power status of the phyCARD-M,
whereas X_WAKEUP is an input pin to apply a wake up signal to the
phyCARD-M.
All three pins lead to GPIOs of the i.MX. Thus their functionality can
be programmed to your needs. In addition the X_WKUP input is
connected to the PWRON2 input of the voltage regulator to allow
implementing a power management by programming the power
management IC.
The following table shows the location of the power management pins
on the phyCARD-Connector and the corresponding GPIOs of the
i.MX35.
Pin # Signal
I/O SL
Description
X2A4
8
X_WKUP I
VDD_3V3
_BACKUP
Wakeup Interrupt Input
(µC port GPIO3_0 (at R4) and
PMIC PWRON2 input)
X2B2
6
nSuspend_to_RA
M
OC
VDD_3V3
_BACKUP
Suspend to RAM Open
Collector Output
(µC port GPIO2_29 (at V2))
X2B2
9
nPower_off OC
VDD_3V3
_BACKUP
Power Off Open Collector
Output (µC port
GPIO2_30 (at T5))
Table 5:
Power Management Pins
With the two output signals nPower_off (pin X2B29) and
nSuspend_to_RAM (pin X2B26) three different power states can be
defined.
Содержание phyCARD-M
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Страница 32: ...phyCARD M PCA A M1 xxx Figure 7 Jumper locations bottom view 24 PHYTEC Messtechnik GmbH 2010 L 750e_1 ...
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