Pin Number
Signal Name
I/O
Function
6
RX-
In
Differential twisted pair receive (-), signal line shared with CON7 (pin 6)
7
-
-
75製 terminal after connection with CON2 (pin 8), signal line shared with
CON7 (pin 7)
8
-
-
75製 terminal after connection with CON2 (pin 7), signal line shared with
CON7 (pin 7)
5.7 CON7 Signals
Pin Number
Signal Name
I/O
Function
1
TX+
Out
Differential twisted pair transmit (+),
signal line shared with CON2 (pin 1)
2
ACTIVITY_LED
Out
Activity indicator
(low: data transmit/receive, high: no data)
3
RX+
In
Differential twisted pair receive (+),
signal line shared with CON2 (pin 3)
4
TX-
Out
Differential twisted pair transmit (-),
signal shared with CON2 (pin 2)
5
-
-
75製 terminal, signal line shared with CON2 (pins 4, 5)
6
RX-
In
Differential twisted pair receive (-),
signal line shared with CON2 (pin 6)
7
-
-
75製 terminal, signal line shared with CON2 (pins 7, 8)
8
LINK_LED
-
Link indicator
(low: link established, high: no link)
9
+3.3V_CPU
Power
Power (+3.3V_CPU)
[1]
10
GND
Power
Power (GND)
[1]
The combined maximum output current of CON1, CON4, CON7 and CON10 is 200mA.
As CON2 and CON7 share the same signal lines they cannot both be used at the
same time. Please be sure to use only one of the connectors.
5.5. CON3, CON4 (Serial Interface)
CON3 and CON4 are an asynchronous serial interface connected to a UART controller in the i.MX257. Although CON3
and CON4 have differing connector types and pin layouts, they share the same serial signal lines.
• Signal input/output levels: RS232C levels
• Max data rate: 230.4kbps
• Flow control: CTS, RTS, DTR, DSR, DCD, RI
• Controller: i.MX257 internal UART controller (UART2)
• CON3 connector type: D-Sub 9 pin
• CON4 connector type: 10 pin (2x5, 2.54mm pitch)
Armadillo-400 Series Hardware Manual
Interface Specifications
20
