phyCARD-M [PCA-A-M1-xxx]
32
©
PHYTEC Messtechnik GmbH 2010 L-750e_1
Power State
Signal
Power On
Standby
Off
nSuspend_to_RAM
High Low
X
nPower_off
High High
Low
VDD_3V3_IN
On Off
Off
VBAT
X On
Off
X=don’t care
Table 6:
Power States
Please refer to the chapter "Power Management" in the phyCARD
Design-In Guide for more information about the implementation of
the power management into your design.
Caution:
According to the specification for the phyCARD family writing
custom software to utilize pins nPower_off and nSuspend_to_RAM
requires them to be configured as Open Collector Output.
Use of the power management features of the PMIC at U1 allows for a
higher granularity in control of the power consumption. To implement
power management with the PMIC it can be programmed via an I
2
C
interface. The MC13892 can be accessed at I
2
C address 0x10 / 0x11
(write/read). Please refer to the
MC13892 User's Guide
for more
information.
As a third option jumpers J2 and J9 allow to switch off devices on the
phyCARD-M, if VBAT is the only supply voltage.