Rainbow Electronics MAX66020 - Manual (Page 11)

The command descriptions in this section only show
the information field of the I-blocks used to transmit
requests and responses. Since the MAX66020 neither
supports chaining nor generates WTX requests, when it
receives an I-block, the MAX66020 responds with an
I-block. The block number in the I-block response is the
same as in the I-block request.
Error Indication
Depending on the complexity of a function, various
error conditions can occur. In case of an error, the
response to a request begins with a 01h byte followed
by one error code.
Table 4 shows a matrix of commands and potential
errors. If there was no error, the information field of
the response begins with 00h followed by command-
specific data, as specified in the detailed command
description.
If the MAX66020 does not recognize a command, it
does not generate a response.
Detailed Command Descriptions
Get System Information
This command allows the master to retrieve technical
information about the MAX66020. In the response, the
least significant UID byte is transmitted first. The
response is adapted from ISO 15693-3, Section 10. The
IC reference code indicates the die revision in hexa-
decimal format, such as A1h, A2h, B1h, etc. To receive
the system information, issue a request with the com-
mand code 2Bh in the request information field.
MAX66020
ISO/IEC 14443 Type B-Compliant
1Kb Memory Fob
______________________________________________________________________________________ 11
FAILING COMMANDS
ERROR DESCRIPTION
ERROR
CODE
G
e
t S
yst
em
In
fo
rm
a
ti
o
n
W
rit
e S
in
g
le
B
lo
ck
L
o
ck B
lo
ck
R
ead
S
in
g
le
B
lo
ck
R
ead
S
in
g
le
B
lo
ck
w
it
h
B
lo
ck S
e
cu
ri
ty
S
tat
u
s
C
u
s
to
m
R
ead
B
lo
ck
W
rit
e AF
I
L
o
ck A
F
I
G
e
t UID
Invalid block number 10h
Already locked 11h
Write access failed because block is locked 12h
Table 4. Error Code Matrix
INDICATOR
INFO
FLAGS
UID U1 AFI
NUMBER OF
BLOCKS
MEMORY BLOCK
SIZE
IC REFERENCE
00h 0Fh (8 Bytes) (1 Byte) (1 Byte) 12h 07h (1 Byte)
Response Information Field for the Get System Information Command (No Error)