Rainbow Electronics MAX66120 - Manual (Page 16)

REQUEST FLAGS COMMAND UID
(1 Byte) 2Bh (8 Bytes)
REQUEST FLAGS COMMAND UID BLOCK NUMBER NEW BLOCK DATA
(1 Byte) 21h (8 Bytes) (1 Byte) (8 Bytes)
RESPONSE
FLAGS
INFO
FLAGS
UID DSFID AFI
NUMBER OF
BLOCKS
MEMORY BLOCK
SIZE
IC REFERENCE
00h 0Fh (8 Bytes) (1 Byte) (1 Byte) 12h 07h (1 Byte)
MAX66120
ISO 15693-Compliant 1Kb Memory Fob
16 ______________________________________________________________________________________
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
e
a
d
M
u
lt
ip
le
B
lo
cks
Cu
s
to
m
R
ead
B
lo
ck
W
rit
e AF
I
L
o
ck A
F
I
Wr
it
e
D
S
F
ID
L
o
ck D
S
F
ID
Invalid block number 10h
Already locked 11h
Write access failed because block is locked 12h
Table 5. Error Code Matrix
Detailed Command Descriptions
In the request data graphics of this section, the UID
field is shaded to indicate that the inclusion of the UID
depends on the address mode.
Get System Information
The Get System Information command allows the mas-
ter to retrieve technical information about the
MAX66120. The IC reference code indicates the die
revision in hexadecimal format, such as A1h, A2h, B1h,
etc.
Write Single Block
The normal way to write data to the device is through
the Write Single Block command. This command uses
one command-specific parameter, which is the memory
block number. Valid block numbers are 00h to 11h.
Writing a block takes t
PROG
. The response is transmit-
ted after the memory is updated.
Depending on the protection settings of the memory
location to be updated, the MAX66120 manipulates
data as it arrives in a buffer. Upon receiving a Write
Single Block request for a write-protected location (e.g.,
a self-locking nibble or byte in memory block 11h), the
buffer is loaded with the data already in memory, rather
than the data transmitted in the request. Similarly, if the
target memory block is in EPROM mode, the buffer is
loaded with the bitwise logical AND of the transmitted
data and data already in memory. In all other cases, the
data sent by the master arrives in the buffer unaltered.
* If this command is processed without any error, the slave responds with a response flags byte of 00h.
Request Data for the Get System Information Command
Response Data for the Get System Information Command (No Error)
Request Data for the Write Single Block Command*