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NXP Semiconductors
AN11022
CLRC663 Quickstart Guide
4.2 Load Protocol command
The Load Protocol command reads data from the internal EEPROM and initializes the
CLRC663 registers needed for a Protocol change.
The command reads out the EEPROM (RX and TX protected area) and copies the
values from the RX- and TX protected area into the Registers.
The RX and TX protected area is a special area in the EEPROM with read access only.
The load protocol command loads only the values for the registers 0x48 and 0x4A –
0x5F. The command loads only these registers because they are only related to the type
of protocol that is used and not hardware or software related. From this it follows that the
rest of the registers, for the chosen protocol have to be set in addition (see chapter 4.3
and following).
The Parameter for the command is:
Protocol Number RX (1 byte, 0x00 - 0xFF) + Protocol Number TX (1 byte, 0x00 - 0xFF)
The following table (Table 10
) is an overview over the predefined protocols that can be
loaded.
Note: The predefined Values for the RX and TX Protected area are shown in the
ID2 antenna charts in Chapters 4.3 and following (marked in blue ).
Table 10. Predefined protocol overview
Protocol
Number
Protocol
Transmitter
speed [kbits/s]
Modulation
Receiver
speed
[kbits/s]
Modulation
00
ISO/IEC14443 A
106
Miller
106
Manchester SubC
01
ISO/IEC14443 A
212
Miller
212
BPSK
02
ISO/IEC14443 A
424
Miller
424
BPSK
03
ISO/IEC14443 A
848
Miller
848
BPSK
04
ISO/IEC14443 B
106
NRZ
106
BPSK
05
ISO/IEC14443 B
212
NRZ
212
BPSK
06
ISO/IEC14443 B
424
NRZ
424
BPSK
07
ISO/IEC14443 B
848
NRZ
848
BPSK
08
FeliCa
212
Manchester
212
Manchester
09
FeliCa
424
Manchester
424
Manchester
10
ISO/IEC15693
¼
SSC
11
ISO/IEC15693
¼
DSC
12
ISO/IEC15693
1/256
SSC
13
EPC/UID
Unitray
SSC
14
ISO/IEC18000-3
Mode 3
Tari, ASK,PIE
2/424
AN11022 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2015. All rights reserved.
Application note
COMPANY PUBLIC
Rev. 1.2 — 14 January 2015
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