Digi NS9210 User Manual
Page 61
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61
The development board provides one, 2x25-pin, 0.10” (2.54mm) pitch header for
supporting application-specific daughter cards/expansion boards:
X33, Peripheral application header. Provides access to an 16-bit data bus, 10-
bit address bus, and control signals (such as CE#, IRQ#, WE#), as well as I
2
C and
power (+3.3V). Using these signals, you can connect Digi-specific extension
modules or your own daughter card to the module’s address/data bus.
Peripheral
application
header, X33
Peripheral application pins are allocated as shown:
Pin
Signal
Pin
Signal
1
GND
2
BDO
3
BD1
4
BD2
5
BD3
6
GND
7
BD4
8
BD5
9
BD6
10
BD7
11
GND
12
BD8
13
BD9
14
BD10
15
BD11
16
GND
17
BD12
18
BD13
19
BD14
20
BD15
21
GND
22
* 8-bit / 16-bit#
GND selects 16-bit data bus
23
GND
24
+3.3V
25
+3.3V
26
BA0
27
BA1
28
BA2
29
BA3
30
GND
31
BA4
32
BA5
33
BA6
34
BA7
35
GND
36
BA8
37
BA9
38
GND
39
EXT_CSO#
40
I2C_SDA/GPIO103
41
EXT_WE#
42
EXT_OE#
43
I2C_SCL/GPIO102
44
EIRQ3/GPIO101
45
+3.3V
46
+3.3V
47
GPIO86
48
GPIO87
49
EXT_CLK
50
GND