Critical Link, LLC
www.CriticalLink.com
MityARM-335x Development Kit
www.MityDSP.com
12 April 2013
14
Copyright © 2007-2013, Critical Link LLC
Expansion Port Naming Description
Table 7: J700 Expansion Port Signal Description
Signal
Type
Standard
Notes
GPMC_CS#_N
I/O
3.3V CMOS
Chip select signals to MityARM
GPMC_AD##
I/O
3.3V CMOS
GPMC Address/Data Direct Interface to
MityARM-335x Module
GPMC_CLK
O
3.3V CMOS
GPMC Clock output maximum 100Mhz
GPMC_Wait0
I
3.3V CMOS
GPMC Wait0 signal to MityARM-335x
Module
GPMC_XXXX_XXX I/O
3.3V CMOS
Other GPMC control I/O signals to
MityARM-335x Module
SPI1_D1_MISO
I
3.3V CMOS
SPI input signal
SPI1_SCLK &
SPI1_DO_MOSI
O
3.3V CMOS
SPI output signals
I2C0_XXX
I/O
3.3V CMOS
I2C bus signals
Debug/Boot RS232 Interface
– J507
Table 8: J507 DB9 Connector Pin Assignments
Pin
Signal
Type
Standard
Notes
1
RESERVED
-
-
2
BOOT_RS232_RX
O
RS232
RS232 RX to MityARM Debug Port
3
BOOT_RS232_TX
I
RS232
RS232 TX from MityARM Debug Port
4
RESERVED
-
-
5
GND
Power
-
RS232 Ground
6
RESERVED
-
-
7
RESERVED
-
-
8
RESERVED
-
-
9
RESERVED
-
-
Dual CAN Interface
– J503 & J504
Table 9: J503 CAN1 & J504 CAN0 Connector
1
Pin Assignments
Pin
Signal
Type
Standard
Notes
1
RESERVED
-
-
2
CANL
I/O
CAN Bus Signal L
3
GND_ISOCANx
2
Power
-
CAN Bus Isolated Ground
4
RESERVED
-
-
5
RESERVED
-
-
6
RESERVED
-
-
7
CANH
I/O
CAN Bus Signal H
8
RESERVED
-
-
9
+5V_CANx
2
Power
-
Is5V Output, 20mA Max
10
RESERVED
-
-
Note 1: Please see Figure 7 for physical pin-out of connector
Note 2: The ‘x’ at the end of the signal names is either a 1 or a 0 depending on which
CAN interface you are using.
