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NXP Semiconductors
UM191812
PN544 C2 User Manual
191812
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© NXP B.V. 2010. All rights reserved.
User Manual
Rev. 1.2 — 2010-06-16
51 of 172
The
NXP_EVT_INFO_EXT_RF_FIELD
event has the following parameter:
Table 39.
EXT_RF_FIELD Event
Description Length
Presence 1
Presence field indicates current external RF field presence
- 0x00: indicates no RF field present
- 0x01: indicates RF field present
The
NXP_EVT_INFO_TEMP_OVERHEAT
event has the following parameter:
Table 40.
TEMP_OVERHEAT Event
Description Length
Status 1
Status indicates about the protection procedure status
- 0x00: indicates temperature overheat detected then PN544 will enter standby
mode (50ms after the event has been sent)
- 0x01: indicates temperature cooled down then PN544 has rebooted
Table 41.
R/W Commands
Value Event
Description
’3E’
NXP_READ
This command is used by the host to read PN544 memory
’3F’
NXP_WRITE
This command is used by the host to write PN544 memory