W3100A Datasheet, PDF (6/63 Pages) List of Unclassifed Manufacturers – i2Chip W3100A

34
/FDPLX
28, 47, 56
MODE[2–
0]
order to configure the W3100A for Serial MII operation.
I FULL/HALF DUPLEX SELECT: This input pin selects Half/Full
Duplex operation.
This pin must be externally pulled low (typically x kΩ) in order to
configure the W3100A for Full Duplex operation.
0 = Full Duplex
1 = Half Duplex
I MODE SELECT: This input pin selects MCU I/F type and operating
mode of W3100A.
Since each pin is positioned as pull-down internally, clock mode –
the default mode – is selected when the connection is not made.
M2 M1 M0
Description
0 0 0 Clocked Mode where MCU Bus signal is
mode analyzed by W3100A by using the
clock when MCU Bus I/F is in
use.
0 0 1 External Mode where MCU Bus signal is
clocked analyzed by W3100A by using the
mode external clock when MCU Bus I/F
is in use.
0 1 0 Non-
Mode where MCU bus signal is
clocked used directly by W3100A when
mode MCU Bus I/F is in use.
01
1
I²C
Mode using I²C for MCU I/F.
mode
1 X X Test
Mode used for testing at the plant.
mode Not to be used by regular users.
Clocked mode, External clocked mode and Non-clocked mode are
used to connect MCU and W3100A when MCU Bus I/F is in use.
Choose an appropriate mode and use it by analyzing the MCU bus
timing. Refer to timing diagram for each mode for more detail.
Table 4: W3100A Power Supply Signal Description
PIN#
Signal I/O
Description
2, 12, 22,
VCC
POSITIVE 3.3V SUPPLY PINS
38, 39, 58
3, 13, 23,
GND
NEGATIVE (GROUND) SUPPLY PINS: a decoupling capacitor is
37, 45, 54,
recommended to be connected between the Vcc and GND pins
57
~p•Œ›GšGyhwpkGOyŒœšˆ‰“ŒGh——“Šˆ›–•Tš—ŒŠŠGp•›Œ““ŒŠ›œˆ“Gw™–—Œ™› GkŒŒ“–—Œ™PHG
]