W3100A Datasheet, PDF (45/63 Pages) List of Unclassifed Manufacturers – i2Chip W3100A

1Byte-unit access is functions as illustrated in the above diagram, and random byte write sends in the order of START, DEVICE ADDRESS, 2 Byte address of the
actual register to be accessed, and the actual data before sending STOP.
In order to set up the address of the register to be accessed, random byte read first sends START, DEVICE ADDRESS and 2 Byte register address before sending
STOP. Later, once again, START, DEVICE ADDRESS is sent, actual data is read and STOP is sent.
RANDOM BYTE READ
S
T
A
R
T
SDA
LINE
M
S
B
S
T
A
R
T
SDA
LINE
M
S
B
W
R
I
DEVICE
T
ADDRESS
E
DEVICE
ADDRESS
L RAM
S / CS
B WK B
R
E
A
D
L RAM
S / CS
B WK B
WORD
ADDRESS0(1B)
DATA(1B)
L AM
S CS
B KB
S
T
O
P
LN
SO
BA
C
K
WORD
ADDRESS1(1B)
S
T
O
P
LA
SC
BK
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