
NXP Semiconductors
UM191812
PN544 C2 User Manual
191812
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2010. All rights reserved.
User Manual
Rev. 1.2 — 2010-06-16
54 of 172
9.3.1 Default mode to Standby mode
When PN544 is not used (No RF communication, no Host communication, no UICC
communication), it stays in a “default mode” which can be set by the
PWR_STATUS
EEPROM area.
2 modes are available:
ActiveBAT
or
Standby
.
ActiveBAT
mode means that the PN544 is kept awake (default mode).
Standby
mode is the PN544 low power mode; this is the best setup to save power.
PN544 default mode is set to
ActiveBAT.
To save power the default mode can be changed to
Standby
. To setup
Standby
mode as
default PN544 mode, the following registry has to be set:
Table 47.
Setting for set Default mode to Standby
Registry
Length
(bytes)
Value(s) comments
PWR_STATUS 1
0x01
Define Standby mode as the ‘default’ PN544 mode.