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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
144 of 172
To inverse permanently the polarity of a GPIO port, the corresponding bit to 1 in
0x9892
GPIO_Config_PINV register.
9.18 Download
This chapter describes the EEPROM download of PN544.
The Download mode use a specific protocol (different from LLC/HCI) described in [8].
The only way to leave the Download mode is to perform a reset (through download mode
reset command or HW reset).
9.18.1 Switch in ‘Download’ mode
To switch in this mode, the
GPIO4
has to be set to
PVDD
and PN544 must be reset
(using VEN).
As soon as PN544 has switched in ‘Download’ mode, it can not leave it without a specific
command (Reset command of this mode) or a Hardware Reset.
To perform this SW update, NXP will provide binary files for EEPROM update. On Host
controller side, binary file content needs to be written to PN544 EEPROM using the
Download protocol as follows: