Tibbo DS1100 User Manual

89 Programmable Hardware Manual (PHM)
© Tibbo Technology Inc.
TX, W1, and dout output of the serial port 1.
31
(1,2,3)
GPIO19/P2.3/I
NT3
General-purpose I/O line 19 (P2.3);
interrupt line 3.
32
(1,2)
GPIO12/P1.4/R
X2
General-purpose I/O line 12 (P1.4);
RX, W1, and din input of the serial port 2.
33
(1,2,3)
GPIO20/P2.4/I
NT4
General-purpose I/O line 20 (P2.4);
interrupt line 4.
34
(1,2)
GPIO13/P1.5/T
X2
General-purpose I/O line 13 (P1.5);
TX, W1, and dout output of the serial port 2.
35
(1,2,3)
GPIO21/P2.5/I
NT5
General-purpose I/O line 21 (P2.5);
interrupt line 5.
36
(1,2)
GPIO14/P1.6/R
X3
General-purpose I/O line 14 (P1.6);
RX, W1, and din input of the serial port 3.
37
(1,2,3)
GPIO22/P2.6/I
NT6
General-purpose I/O line 22 (P2.6);
interrupt line 6.
38
(1,2)
GPIO15/P1.7/T
X3
General-purpose I/O line 15 (P1.7);
TX, W1, and dout output of the serial port 3.
39
(1,2,3)
GPIO23/P2.7/I
NT7
General-purpose I/O line 23 (P2.7);
interrupt line 7.
40
AVCC
"Clean" 2.5V power output for magnetics circuitry.
41
TX-
Ethernet port, negative line of the differential
output signal pair.
42
EG
Green Ethernet status LED control line.
43
TX+
Ethernet port, positive line of the differential output
signal pair.
44
EY
Yellow Ethernet status LED control line.
45
RX-
Ethernet port, negative line of the differential input
signal pair.
46
AGND
Analog ground.
47
RX+
Ethernet port, positive line of the differential input
signal pair.
Notes:
1. This line is 5V-tolerant and can be interfaced to 5V CMOS devices directly.
2. This line can serve as an RTS/Wout/cout line of a serial port (provided that this
does not interfere with any other function).
3. This line can serve as a CTS/W0&1in/cin line of a serial port (provided that this
does not interfere with any other function).
4.6.1.1
General-purpose I/O Lines
The EM1202 has 32 general-purpose I/O lines (GPIO0 - GPIO31). 24 of these lines
are combined into three 8-bit ports. All lines are 3.3V, CMOS, 5V-tolerant. Maximum
load current for each I/O line is 10mA.
Simplified structure of one I/O line of the EM1202 is shown on the circuit diagram
below. Each line has an independent output buffer control. When the EM1202
powers up all I/O lines have their output buffers tri-stated (in other words, all I/O

Tibbo DS1100 Specifications

General

Brand	Tibbo
Model	DS1100
Category	Controller
Language	English