Tibbo EM1000 User Manual

52Embedded Modules
© Tibbo Technology Inc.
6
(1,2)
GPIO10/P1.2
General-purpose I/O line 10 (P1.2).
7
(1,2)
GPIO11/P1.3
General-purpose I/O line 11 (P1.3).
8
(1,2)
GPIO12/P1.4
General-purpose I/O line 12 (P1.4).
9
(1,2)
GPIO13/P1.5
General-purpose I/O line 13 (P1.5).
10
(1,2)
GPIO14/P1.6
General-purpose I/O line 14 (P1.6).
11
(1,2)
GPIO15/P1.7
General-purpose I/O line 15 (P1.7).
Notes:
1. This line is 5V-tolerant and can be interfaced to 5V CMOS devices directly.
2. This line can be assigned to serve as an RTS/Wout/cout line of a serial port.
Magnetics connector
Pin #
Function
Description
#1
RX+
Ethernet port, positive line of the differential input
signal pair.
#2
RX-
Ethernet port, negative line of the differential input
signal pair.
#3
AVCC
"Clean" 1.8V power output for magnetics circuitry.
#4
---
---
#5
---
---
#6
AGND
Analog ground.
#7
TX+
Ethernet port, positive line of the differential output
signal pair.
#8
TX-
Ethernet port, negative line of the differential output
signal pair.
4.3.1.1
General-purpose I/O Lines
The EM1206 has 17 general-purpose I/O lines (GPIO0 - GPIO16). All lines are 3.3V,
CMOS, 5V-tolerant. Maximum load current for each line is 10mA. Out of seventeen
available lines, sixteen are combined into two 8-bit ports.
The simplified structure of one I/O line of the EM1206 is shown on the circuit
diagram below. Each line has an independent output buffer control. When the
EM1206 powers up all 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.
Each I/O line has a weak pull-up resistor that prevents the line from floating when
the output buffer is tri-stated. I/O line control is described in the io. object
documentation (TIDE, TiOS, Tibbo BASIC, and Tibbo C Manual).

Tibbo EM1000 Specifications

General

Brand	Tibbo
Model	EM1000
Category	Control Unit
Language	English