Tibbo EM1000 User Manual

12Embedded Modules
© Tibbo Technology Inc.
60
VCC
Positive power input, 3.3V nominal, +/- 5%,
max. current consumption 100mA
(100BaseT, full speed).
61
TX-
Ethernet port, negative line of the
differential output signal pair.
62
<N.C.>
Not connected.
63
TX+
Ethernet port, positive line of the
differential output signal pair.
64
EY
Yellow ("link") Ethernet status LED control
line.
65
<N.C.>
Not connected.
66
EG
Green ("100mb") Ethernet status LED
control line.
67
RX-
Ethernet port, negative line of the
differential input signal pair.
68
GND
System ground.
69
RX+
Ethernet port, positive line of the
differential input signal pair.
70
GND
System ground.
71
(4)
GND
Wireless add-on port, ground line.
72
(4)
VCC
Wireless add-on port,3.3V power line of the
available on this pin. Do not connect to the
power source. To avoid current loops, only
use pin #60 to power the device.
73
(1,2,4)
GPIO49
Wireless add-on port, general-purpose I/O
line 49 (does not belong to any 8-bit port).
74
(4)
<N.C.>
Leave this pin unconnected.
75
(1,2,4)
GPIO50
Wireless add-on port, general-purpose I/O
line 50 (does not belong to any 8-bit port).
76
(4)
<N.C.>
Leave this pin unconnected.
77
(1,2,4)
GPIO51
Wireless add-on port, general-purpose I/O
line 51 (does not belong to any 8-bit port).
78
(4)
<N.C.>
Leave this pin unconnected.
79
(1,2,4)
GPIO52
Wireless add-on port, general-purpose I/O
line 52 (does not belong to any 8-bit port).
80
(1,2,4)
GPIO53
Wireless add-on port, general-purpose I/O
line 53 (does not belong to any 8-bit port).
4.1.1.1
General-purpose I/O Lines
The EM2000 has 56 general-purpose I/O lines (GPIO0 - GPIO55). All lines are 3.3V,
CMOS, 5V-tolerant lines. Maximum load current for each I/O line is 20mA. Fifty one
of these lines are always available. Remaining five lines are located on the wireless
add-on connector. This connector is facing the host PCB only on EM2000-...-A
devices.
The simplified structure of one I/O line of the EM2000 is shown on the circuit
diagram below. Each line has an independent output buffer control. When the
EM2000 powers up, all its I/O lines have their output buffers tri-stated (in other
words, all I/O lines are configured as inputs). You need to explicitly enable the
output buffer of a certain I/O line if you want this line to become an output.

Tibbo EM1000 Specifications

General

Brand	Tibbo
Model	EM1000
Category	Control Unit
Language	English